NEWS.md

flux-core version 0.42.0 - 2022-08-02

New Features

• add flux_open_ex(3) (#4450)
• flux-top: support split of inactive jobs into completed and failed (#4449)
• job-manager: add limits plugins for duration and job size (#4415)
• kvs: add defensive checkpoint and kvs.checkpoint-period TOML config (#4383)
• python: add LSF URI resolver plugin (#4385)
• allow configurable defaults for jobspec system attributes (#4386)
• jobtap: add conf.update callback (#4411)
• Add a posix_spawn() implementation to libsubprocess and use it to launch job shells (#4395)
• jobtap: add job.create, job.destroy callbacks (#4392)
• job-manager: allow dependencies on inactive jobs (#4388)

Fixes

• content-sqlite,files,s3: register with cache after setup complete (#4458)
• flux-overlay: add man page, open to guest users (#4459)
• flux-relay: initialize log prefix to hostname when possible (#4454)
• flux-top: avoid premature exit on recursive top error (#4452)
• job-manager: improve robustness of max job id recovery on restart (#4443)
• flux-config-bootstrap(5): improve hosts description (#4444)
• libflux: handle flux_respond_error (errnum=0) (#4427)
• flux-queue(1): add man page (#4426)
• sched-simple: fix allocation of down nodes when using constraints (#4425)
• job-archive: improve logging on parse job error (#4422)
• job-info: handle invalid eventlog entry errors more carefully (#4416)
• flux-dump: fix handling of empty blobref value (#4418)
• job-manager: fix race in job eventlog commit and job shell start (#4412)
• job-manager: fix dependency-add from job.state.depend callback (#4406)
• job-manager: ensure job aux items are destroyed safely (#4397)
• job-manager: fix restart code to handle jobs from earlier releases (#4399)

Cleanup

• use ccan ARRAY_SIZE() macro (#4445)
• kvs: rename kvs.sync target to kvs.wait-version (#4410)
• Use flux_error_t and errprintf() over char buf and snprintf() (#4407)
• content-sqlite: fix double free (#4391)
• kvs: misc cleanups (#4389)

Testsuite

• ci: create kvs dumpfile from previous tag for testing (#4402)

flux-core version 0.41.0 - 2022-07-04

New Features

• job-manager: transition NEW to DEPEND on "validate" event (#4366)
• kvs: support FLUX_KVS_SYNC (#4348)
• shell: obtain hwloc XML from enclosing instance (#4373)
• libkvs: add flux_kvs_commit_get_rootref() (#4374)

Fixes

• job-manager: fix case where a job manager epilog can't be configured without a prolog (#4382)
• broker: return error in content.flush if no backing store exists (#4376)
• broker: content cache corner case corrections (#4380)
• job-manager: transition back to PRIORITY state on urgency update (#4364)
• wait for 'finish' instead of 'clean' event in flux-mini run and flux-job attach (#4361)

Cleanup

• kvs: remove excess logging of ENOTSUP (#4381)
• job-manager: misc cleanup (#4362)

Testsuite

• testsuite: fix perilog sanity test (#4363)
• t2201-job-cmd.t: fix bug in UTF-8 test (#4360)

flux-core version 0.40.0 - 2022-06-07

New Features

• content-sqlite: verify database integrity during module load (#4340)
• job-exec: support new sdexec job launch plugin (#4070)
• job-manager: post submit event, instead of job-ingest (#4346)
• shell: execute job tasks in their own process group (#4355)

Fixes

• shell: improve handling of TMPDIR (#4330)
• job-manager: do not send purged events (#4334)
• job-list: consistently return job attributes (#4327)
• python: fix confusing error message from pid URI resolver (#4335)
• improve logging of overlay peer authentication (#4342)
• libflux: return better errno in future wait path (#4345)
• shell: fix reconnect hang (#4293)
• libsubprocess: avoid segfault on empty argv (#4350)
• docs: add python resource_list docstrings (#4353)

Cleanup

• job-list: misc cleanup (#4332)
• job-manager: misc cleanup (#4352)

Testsuite

• docker: update default version of flux-security to v0.7.0 (#4356)

flux-core version 0.39.0 - 2022-05-06

New Features

• job-list: support new "all" attribute to get all job attributes (#4324)
• flux-overlay: replace --no-color with --color=WHEN (#4322)
• flux-overlay: add -H, --highlight option (#4322)
• flux-shutdown: add --gc garbage collection option (#4303)
• content: track RFC 10 protocol changes (#4299)
• flux-dmesg: colorize output and add -H, --human option (#4289)
• job-manager: add inactive job purge capability (#4286)
• libutil: support "ms" suffix for Flux Standard Duration (#4284)
• add flux-resource info subcommand (#4272)

Fixes

• python: uri: fix intermittent failure of fallback pid resolver (#4320)
• flux-job: fix purge usage message (#4318)
• use correct type in content-sqlite, misc. content test cleanup (#4315)
• job-archive: use safer pragmas (#4307)
• select safer content.sqlite consistency pragmas (#4294)
• sched-simple: do not allocate down nodes with --exclusive (#4292)
• python: fix return from flux.importer.import_plugins() when no plugins found (#4288)
• fix hang when job with an interactive pty fails early (#4283)
• broker: prevent downstream peers from connecting during shutdown (#4277)

Cleanup

• flux-shutdown(1): document new options (#4323)
• README: add libarchive prerequisite (#4319)
• content-s3: cosmetic cleanup (#4314)
• job-list: misc cleanups (#4297)
• broker: suppress online message with no members (#4298)
• job-manager: introduce config callback (#4279)
• libev: update to version 4.33 (#4282)
• libflux: convert flux_conf_error_t to flux_error_t (#4278)
• resource: stop collecting/reducing hwloc XML (#4263)
• flux-hwloc: remove command (#4262)
• flux-resource: remove ranks from default status output (#4271)
• libsubprocess: remove prefix on server setup (#4268)

Testsuite

• testsuite: increase test timeout (#4321)
• teststuite: document and fixup LONGTEST tests (#4305)
• testsuite: minor README fixes / updates (#4291)
• docker: update default flux-security version to v0.6.0 (#4274)
• testsuite: fix failing tests on parallel testsuite runs (#4275)
• ci: add build for Fedora 35 (#4270)

flux-core version 0.38.0 - 2022-04-04

This release makes a few improvements that are visible in the flux-mini(1) command:

• The -N,--nnodes option may be used without the -n,--nprocs option.
• The --exclusive option requests the allocation of whole nodes.
• The --requires option requests resources with generic properties.

Additionally, Flux system administrators should be aware of these changes:

• Named properties may be assigned to resources in the configured R.
• flux-shutdown(1) is now the preferred way to stop a Flux system instance.
• The default archive.dbpath is now /var/lib/flux/job-archive.sqlite.
• systemd-coredump(8) can now capture a Flux broker core dump. Consider enabling this on the management nodes of early access systems to help gather information on critical rank 0 broker failures, should they occur.
• flux resource drain now shows nodes as "draining" if they are still running work.
• Flux may be configured to reject jobs that do not run in a Flux sub-instance.

For more information, see the Flux Administrator's Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

New Features

• add flux-shutdown command (#4250)
• add flux-dump and flux-restore (#4208, #4225)
• support for node exclusive allocations (#4245)
• add support for resource properties (#4236)
• flux-resource: support properties when listing resources (#4249)
• job-ingest: add TOML config (#4238)
• flux-dmesg: add --new option, plus logging cleanup (#4237)
• add 'require-instance' job validator plugin (#4239)
• job-manager: add builtin job duration validator plugin (#4224)
• sched-simple: set expiration of jobs with no duration to instance lifetime (#4223)
• flux-resource: differentiate drained vs draining ranks (#4205)
• librlist: support hwloc discovery of AMD RSMI GPUs (#4203)
• broker: reject remote exec requests on rank 0 (#4258)
• python: allow resource count of 0 in jobspec v1 (#4259)
• job-archive: use statedir path if dbpath is not set (#4260)

Fixes

• content-sqlite: ensure that module load fails if initialization fails (#4265)
• job-archive: use statedir path if dbpath not set (#4260)
• broker: emit error when running interactive shell without tty (#4253)
• broker: add statedir attribute, drop content.backing-path (#4248)
• broker: prevent systemd restart if rc1 fails (#4246)
• flux.service: use StateDirectory for content.sqlite (#4244)
• rc3: ensure exit code reflects any errors (#4243)
• broker: don't leave shutdown state prematurely (#4241)
• libjob: improve flux_job_statetostr(), flux_job_resulttostr() interface (#4235)
• job-list: fix bugs in some error paths (#4233)
• broker: fine tune logging and enable core dump on SIGSEGV (#4231)
• kvs: always store empty directory object to content store (#4229)
• restrict access to content service used as KVS blob layer (#4216)
• content-sqlite: check that file has rw permission (#4215)
• broker: block SIGPIPE (#4211)
• shell: add hostname to a couple key log messages (#4200)
• python: add missing methods and improve efficiency of IDset class (#4209)
• systemd: set SyslogIdentifier to flux (#4206)
• misc minor fixes and cleanup (#4197)
• job-exec: fix more potential hangs after early shell failure (#4199)
• sched-simple: fix counting bug that can cause scheduler to fail after a restart (#4196)
• flux-top: add man page, minor bug fixes (#4194)

Cleanup

• broker: clean up shutdown logs (#4257)
• libsdprocess: minor fixups (#4252)
• job-manager: misc cleanup (#4232)

Testsuite

• testsuite: fix a couple intermittent test failures (#4247)
• ci: run 32bit build under linux32 personality (#4240)
• testsuite: ensure tests can run concurrently with --root=$FLUX_JOB_TMPDIR (#4212)

flux-core version 0.37.0 - 2022-03-04

This release disables resource verification of GPUs by default to workaround issues with GPU detection with system versions of hwloc.

Fixes

• resource: restrict resource verification to cores/hostnames only (#4192)
• resource: assign ranks in R based on hostlist attribute (#4188)
• add assertions that rank, size, hostlist broker attributes are cacheable (#4187)

Testsuite

• testsuite: fix racy tests in t0005-rexec (#4179)

Cleanup

• build: ensure autogen.sh updates package version (#4174)

flux-core version 0.36.0 - 2022-03-01

This release adds support for restarting a Flux system instance in safe mode after a failure to shut down properly -- for example in the case of a broker crash. New flux-startlog(1) and flux-uptime(1) commands are also introduced to give a quick review of the start and stop times and status of the current Flux instance.

System instance users will want to update their configuration files to set tbon.tcp_user_timeout and remove tbon.keepalive_*, if present. For more information, see the Flux Admin Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

Fixes

• job-exec: fix job hang after early IMP/shell exit (#4155)
• broker: allow tbon.zmqdebug to be set in config file and make sure it's really off if set to 0 (#4127)
• broker: handle network partition (#4130)
• shell: capture job shell error messages in designated output file (#4125)
• resource: emit a more specific error when rlist_rerank() fails (#4126)
• flux-overlay: fix timeout error message (#4131)
• README: add libc development packages in requirements (#4133)
• libflux/future: set missing errno in flux_future_wait_for() (#4162)
• flux-config-archive(5): fix TOML example (#4164)
• shell: fix delay in completion of jobs with a single shell rank (#4159)

New Features

• flux-uptime: provide useful output for slow/stuck broker state (#4172)
• improve KVS checkpoint protocol to allow for future changes (#4149)
• add flux config get (#4166)
• broker: use RPC not control message for broker module sync/status (#4110)
• docs: add Python overview documentation (#4104)
• Support new libsdprocess to launch processes under systemd (#3864)
• rename keepalive messages to control messages (#4112)
• resource: enhance resource.drain RPC with "update" and "overwrite" modes (#4121)
• broker: replace keepalive tunables with tcp_user_timeout (#4118)
• kvs: add date to kvs-primary checkpoint (#4136)
• libpmi2: implement bits needed for Cray MPI (#4142)
• add flux-uptime command (#4148)
• add flux-startlog and enter safe mode after crash (#4153)
• libflux: add flux_hostmap_lookup(3) (#4157)

Cleanup

• drop unused project meta files (#4170)
• doc: update flux-broker-attributes(7) (#4119)
• python: return JobID from flux.job.submit, not int (#4134)
• consolidate multiple *_error_t structures into a common flux_error_t (#4165)
• drop unused project meta files (#4170)

Testsuite

• testsuite: remove unportable cshism (#4115)
• codecov: minor improvements for coverage reporting (#4147)
• testsuite: add clarification comments (#4167)

flux-core version 0.35.0 - 2022-02-05

This release fixes a broker crash when a job receives an exception after running a job prolog. Users of the prolog/epilog feature should update to this version as soon as possible.

In addition, TCP keepalive support was added for detection of powered off compute nodes. For configuration info, see the Flux Admin Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

Fixes

• flux-ping: support hostnames in TARGET #4105
• Fix broker segfault when an exception is raised on a job after prolog (#4096)
• flux-overlay: improve timeouts, hostname handling (#4095)
• flux resource: allow limited guest access (#4094)
• shell: fix duplicate logging after evlog plugin is initialized (#4085)
• shell: do not allow instance owner to use guest shell services (#4101)
• shell: fix race in attach to interactive job pty (#4102)
• libterminus: fix leak in pty client code (#4098)

New Features

• broker: use TCP keepalives (#4099)
• systemd: set restart=always (#4100)
• flux-mini: add --wait-event option to submit/bulksubmit (#4078)

Testsuite

• testsuite: fix spellcheck (#4082)
• ci: rename centos images to el, and use rockylinux for el8 image (#4080)

flux-core version 0.34.0 - 2022-01-28

This release features the automatic draining of "torpid" (unresponsive) nodes, to prevent new work from being scheduled on them until the instance owner investigates and runs flux resource undrain.

Fixes

• libsubprocess: fix excess logging and logging corner cases (#4060)
• doc: fix cross-references (#4063)
• flux-proxy: improve experience when proxied Flux instance terminates (#4058)
• flux-perilog-run: improve usefulness of logging when prolog/epilog fails (#4054)
• Fix issues found on Cray Shasta (perlmutter) (#4050)
• env: fix prepend of colon-separated paths in reverse order (#4045)
• python: fix ImportError for collections.abc.Mapping (#4042)
• job-list: fix "duplicate event" errors (#4043)
• systemd: set linger on flux user (#4035)

New Features

• shell: enhance pty support (#4075)
• add broker.starttime; add uptime to flux-top, flux-pstree (#4076)
• libflux: add flux_reconnect(), revamp flux fatal error callback (#4016)
• doc: add/improve man pages for config files (#4057, #4069)
• resource: drain torpid nodes (#4052)

Cleanup

• broker/content: misc cleanup (#4074)
• improve error message from flux-proxy and flux-jobs for invalid and unknown jobids (#4062)
• cmd/flux-ping: make help output clearer (#4061)
• configure: Add python docutils check, do not require doc utils to build flux help (#4056)

Test

• testsuite: fix non-bourne shell test failure (#4064)
• sharness: unset FLUX_CONF_DIR for all tests (#4059)
• ci: fix use of poison-libflux.sh and add poison flux-* commands (#4046)

flux-core version 0.33.0 - 2022-01-08

This release includes several improvements in the recursive tooling in Flux to enhance the user experience when dealing with nested jobs.

Highlights include:

• Improved interface for job URI discovery allows flux proxy and flux top to target jobids directly.
• Addition of a -R, --recursive option to flux jobs
• Support in flux top for selecting and recursing into sub-instances
• A new flux pstree command for displaying job hierarchies in a tree

Fixes

• systemd: fix typo in flux.service unit file (#3996)
• libflux: check reactor flags (#4014)
• fix uninterruptible hang when attached to terminated jobs with -o pty (#4010)
• cmd/flux-jobs: re-work -A option and clarify -a option (#4012)
• broker: avoid inappropriate quorum.timeout (#4027)
• add workaround for invalid job timeouts when system is busy (#4037)

New Features

• add FluxURIResolver Python class and flux-uri command for job URI discovery (#3999)
• cmd: support high-level URIs and JOBID arguments in flux-top and flux-proxy (#4004, #4015)
• flux-top: allow top to recursively call itself (#4011)
• flux-jobs: add --recursive option (#4019, #4024)
• flux-jobs: support instance-specific fields in output (#4022)
• add flux-pstree command (#4026)

Cleanup

• doc: add flux-resource(1), clean up help output (#4021)
• doc: audit / cleanup SEE ALSO and RESOURCES, add cross references (#4007)
• doc: misc updates and fixes (#4009)
• connector cleanup (#4013)
• connectors: avoid embedded synchronous RPC for subscribe/unsubscribe (#3997)

Test

• testsuite: minor testsuite fixes (#4023)
• ci: add ability to run tests under system instance (#3844)
• fluxorama: allow user to sudo to flux user, add common systemd environment vars to flux user's bashrc (#4031)

flux-core version 0.32.0 - 2021-12-05

This release adds early groundwork for recovering running jobs across a Flux restart. It also includes improved log messages based on user feedback about Flux failures on real workflow runs, a first draft of a new flux top tool, and a critical fix for system deployments of Flux (#3958).

Fixes

• python: fix reference counting for Python Message objects (#3983)
• python: avoid early garbage collection of Watcher objects (#3975)
• libflux: improve safety against refcounting bugs in message functions (#3985)
• shell: reject PMI clients that request v2 (#3953)
• resource: don't abort if topo-reduce is received more than once (#3958)

New Features

• systemd: start flux systemd user service (#3872)
• broker: record child instance URIs as job memo (#3986)
• Support job memo events (#3984)
• job-exec: checkpoint/restore KVS namespaces of running jobs (#3947)
• set hostlist broker attribute when boostrapped by PMI (#3966)
• add flux_get_hostbyrank() and improve broker attribute caching (#3971)
• broker: log slow nodes during startup (#3980)
• add flux-top command (#3979)

Cleanup

• flux-overlay: improve default status output, rework options (#3974)
• job-exec: improve job exception message/logging on broker disconnect (#3962)
• drop flux-jobspec command (#3951)
• improve flux-mini bulksubmit --dry-run output with --cc (#3956)
• README: update LLNL-CODE (#3954)
• broker/overlay: misc cleanup (#3948)
• bring README.md up to date (#3990)
• docker: fix and update ci dockerfiles (#3991)

Test

• testsuite: sanitize environment, fix hang in t2607-job-shell-input.t (#3968)

flux-core version 0.31.0 - 2021-11-05

This release includes two noteworthy system instance improvements: crashed/offline nodes now marked offline for scheduling, and support has been added for prolog/epilog scripts that run as root.

For prolog/epilog setup info, see the Flux Admin Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

Fixes

• build: allow python 3.10.0 to satisfy version check (#3939)
• resource: avoid scheduling on nodes that have crashed (#3930)
• broker: fail gracefully when rundir or local-uri exceed AF_UNIX path limits (#3932)
• broker: ignore missing ldconfig when searching for libpmi.so (#3926)
• job-manager: fix running job count underflow and use-after-free when an event is emitted in CLEANUP state (#3922)
• fix problems building flux when 0MQ is not installed as a system package (#3917)
• python: do not auto-stop ProgressBar by default (#3914)

New Features

• support job prolog/epilog commands (#3934)
• job-manager: add prolog/epilog support for jobtap plugins (#3924)
• libidset: add high level set functions (#3915)
• kvs: optionally initialize namespace to a root reference (#3941)
• rc: load job-archive module in default rc (#3942)

Cleanup

• improve broker overlay logging and debugging capability (#3913)
• man: Add note about shell quoting/escaping (#3918)

Test

• mergify: set queue method to merge, not rebase (#3916)
• mergify: replace strict merge with queue+rebase (#3907)
• testsuite: fix non-bourne shell test failure (#3937)

flux-core version 0.30.0 - 2021-10-06

Fixes

• job-manager: small fixes for the alloc-bypass plugin (#3889)
• job-manager: release after:JOBID dependencies after "start" instead of "alloc" event (#3865)
• shell: avoid dropping stderr after a PMI abort (#3898)
• shell: require FLUX_SHELL_PLUGIN_NAME in plugins to fix logging component discovery (#3879)
• libflux: deactivate RPC message handlers after final response (#3853)
• remove duplicate directories from FLUX_RC_EXTRA, FLUX_SHELL_RC_PATH (#3878)
• t: fix incorrect method call in test-terminal.perl (#3888)
• Fix a couple build and test issues on ppc64le with clang 6.0+ (#3875)

New Features

• jobtap: allow jobtap plugins to query posted events for jobs (#3863)
• jobtap: allow jobtap plugins to subscribe to job events (#3861)
• job-exec: enable manual override option for mock execution jobs (#3868)
• shell: improve initrc extensibility, support version specific mpi plugin loading (#3890)
• shell: fixes and enhancements for plugin loading (#3859)
• shell: allow default rc path to be extended via FLUX_SHELL_RC_PATH (#3869)
• shell: add taskids idset to flux_shell_get_rank_info(3) (#3873)
• shell: add library of Lua convenience functions for use in plugins (#3856)
• resource: fail get-xml request on quorum subset (#3885)

Cleanup

• libflux/future: fix comment typo (#3860)
• NEWS.md: Fix typo for v0.29.0 (#3857)

Testsuite

• docker: add --build-arg to docker-run-checks, systemd-devel to centos8 (#3871)
• ci: add fedora 34 build and fix compiler errors from gcc 11.2 (#3854)

flux-core version 0.29.0 - 2021-09-03

This release of Flux includes a new fault mechanism which ensures that unanswered RPCs receive error responses when the overlay network is disrupted. Also included is a new flux overlay utility which can be used to manage and report the status of the overlay network.

Fixes

• shell: fix in-tree pluginpath, add shell_plugindir (#3841)
• python: fix bug in FluxExecutor.attach method (#3839)
• rlist: fix erroneous collapse of nodes with different resource children when emitting R (#3814)
• libkvs: compact only if ops len > 1 (#3807)
• python: allow executor to attach to jobs (#3790)
• python: fix version requirement in jobspec validator plugin (#3784)
• broker: ensure subtree restart upon loss of router node (#3845)
• broker: drop -k-ary option, rename tbon.arity attr to tbon.fanout (#3796)
• add flux-job(1) manual page, plus minor fixes (#3763)
• libjob: improve method for determining instance owner (#3761)

New Features

• add flux overlay status command (#3816)
• broker: improve logging of 0MQ socket events (#3846)
• broker: fail pending RPCs when TBON parent goes down (#3843)
• broker: fail pending RPCs when TBON child goes down (#3822)
• add bootstrap.ipv6_enable = true config option (#3827)
• shell: add functions to access jobspec summary information (#3835)
• add stats api for internal metric collection (#3806, #3824)
• support io encode/decode of binary data (#3778)
• add flag to bypass jobspec validation (#3766)
• libflux: add time stamp to message trace (#3765)

Cleanup

• libzmqutil: generalize the zeromq authentication protocol server (#3847)
• libflux: use iovec-like array over zmsg (#3773)
• libflux: update flux msg route functions (#3746)
• libflux: message API fixes and cleanup (#3771)
• libjob: break up job.c (#3768)
• build: consistently use CFLAGS / LIBS in Makefiles (#3785)
• use CCAN base64 library over libsodium base64 library (#3789)
• drop unnecessary 0MQ includes (#3782)
• various other cleanup (#3762)

Testsuite

• udate to flux-security v0.5.0 in docker images (#3849)
• make valgrind test opt-in (#3840)
• add valgrind suppression for opencl and libev on aarch64 (#3794, #3809)

flux-core version 0.28.0 - 2021-06-30

This release adds simple job dependencies - see the flux_mini(1) DEPENDENCIES section.

Fixes

• shell: fix segfault when more slots are allocated than requested (#3749)
• testsuite: avoid long ipc:// paths in system test personality (#3739)
• cron: fix race in task timeouts (#3728)
• Python/FluxExecutor bug fixes (#3714)
• flux-python: fix use of virtualenv python (#3713)
• optparse: make optional_argument apply to long options only (#3706)
• librlist: skip loading hwloc 'gl' plugin (#3693)

New Features

• allow jobs to bypass scheduler with alloc-bypass jobtap plugin (#3740)
• libjob: add a library for constructing V1 jobspecs (#3662, #3734, #3748)
• python: validate dependencies in Jobspec constructor (#3727)
• libflux: make flux_plugin_handler topic member const (#3720)
• job-manager: add builtin begin-time dependency plugin (#3704)
• broker: send offline responses while broker is initializing (#3712)
• python: add flux.util.parse_datetime (#3711)
• job-manager: support simple after* job dependencies (#3696)
• jobtap: fixes and api enhancements to support dependency plugins (#3698)
• shell: add exit-on-error option (#3692)

Cleanup/Testing/Build System

• job-manager: minor cleanup and improvements for event handling (#3759)
• libflux: make flux_msg_fprint() output clearer (#3742)
• libflux: store fully decoded message in flux_msg_t (#3701, #3758)
• libflux: msg API cleanup, test cleanup, and test enhancement (#3745, #3699)
• testsuite: generalize valgrind suppressions (#3743)
• ci: use long path for builddir in test build (#3738)
• job-list: cleanup & testsuite modernization & consistency updates (#3733)
• testsuite: fix several tests on slower systems (#3730)
• testsuite: fix intermittent test, speed up others (#3725)
• broker: misc cleanup (#3721)
• github: fix ci builds on master (#3716, #3717)
• testsuite: add tests for late joining broker (#3709)
• flux-start: build system instance test features (#3700)
• ci: minor coverage testing fixes (#3703)
• libflux: test: fix segfault of test_plugin.t under rpmbuild (#3695)

flux-core version 0.27.0 - 2021-05-28

This release features additonal performance improvements that affect job throughput over time (see issue #3583).

Fixes

• shell/pmi: always populate PMI_process_mapping to avoid mvapich2 MPI_Init invalid tag error (#3673)
• openmpi: ensure that shmem segments for co-located jobs don't conflict (#3672)
• python: fix FluxExecutorFuture cancellation bug (#3655)
• job-info, kvs-watch: support guest disconnect & credential checks (#3627)
• libflux: plugin: make FLUX_PLUGIN_ARG_UPDATE the default (#3685)

Performance

• kvs: reduce cache expiration overhead (#3664)
• kvs: remove client disconnect bottleneck (#3663)
• kvs: use json object to find duplicate keys (#3658)
• kvs: improve performance of transaction prep/check (#3654)
• content-cache: avoid linear search for dirty blobs (#3639)
• content-cache: make LRU purge more effective (#3632)
• flux-shell: add minor optimizations for single node jobs (#3626)
• libczmqcontainers: include zlistx, zhash, zlist, and convert internal users (#3620)

New Features

• shell: add plugin to detect first task exit (#3681)
• job-manager: multiple jobtap plugin enhancements (#3687)
• job-manager: support a list of loaded jobtap plugins (#3667)
• shell: add tmpdir plugin to manage FLUX_JOB_TMPDIR (#3661)
• jobtap: support for job.dependency.* callbacks (#3660)
• flux-mini: avoid substitution without --cc/bcc, allow --setattr value to be read from file (#3659)
• flux-start: add embedded server (#3650)
• flux-proxy: add flux-core version check (#3653)
• libflux: msg_handler: capture duplicate non-glob request handlers in a stack (#3616)

Cleanup/Testing/Build System

• testsuite: add mvapich2 to centos8 CI image (#3686)
• testsuite: improve in-tree MPI testing (#3678)
• libflux: flux_modfind: ignore DSOs with no mod_name symbol (#3675)
• kvs: misc cleanup (#3671)
• flux-start: rename --scratchdir to --rundir (#3670)
• shell: misc environment-related fixes (#3669)
• testsuite: modify jobid capture logic (#3657)
• testsuite: handle hwloc issues and improve config file bootstrap test (#3648)
• build: add and use autoconf variable for Flux plugin LDFLAGS (#3647)
• libutil: replace hand written hex conversion code with libccan (#3646)
• github: fixes for auto-release deployment (#3638)
• content-cache: general cleanup, small bug fixes, and test improvement (#3645)
• kvs: add errmsg on namespace create failure (#3644)
• Use internal functions instead of zfile / zdigest (#3634)
• libutil: avoid zmq_strerror() (#3628)
• ci/test: switch to bulksubmit for inception tests, add throughput test, dismiss reviews after PR updates (#3621)
• expand broker internal documentation to cover bootstrap phase (#3618)

flux-core version 0.26.0 - 2021-04-22

This release features several performance improvements that affect job throughput over time (see issue #3583).

Fixes

• avoid mvapich segfault under flux start singleton (#3603)
• python: avoid throwing 2nd exception on unknown errno (#3588)
• avoid routing stale responses to restarted brokers (#3601)

Performance

• fix aggressive zhashx resize by importing fixed source (#3596, #3598)
• use zhashx, LRU in content-cache (#3589, #3593)
• drop root directory object from KVS setroot event (#3581)
• add minor optimizations to aux container (#3586)
• drop extra code in flux_matchtag_free() (#3590)
• libkvs: save KVS copy/move aux data in future not handle (#3585)

New Features

• libjob: add flux_job_result(3) (#3582)
• python: add explicit service_(un)register method (#3602)
• add overlay network version/config check (#3597)
• job-manager: enable job dependency management (#3563)

Cleanup/Testing

• flux-start: rename --size to --test-size, drop --bootstrap (#3605)

flux-core version 0.25.0 - 2021-04-01

Fixes

• kvs: fix assert due to busy KVS (#3560)
• systemd: configure weak dependency on munge (#3577)
• Fix various memleaks discovered by ASAN (#3568)
• README: add missing dependency - pkgconfig (#3570)
• fix PMI_process_mapping for multiple brokers per node (#3553)
• Python: fix "no such file or directory" job exception resulting from bad jobspec (#3534)

New Features

• libflux: add flux_plugin_aux_delete() (#3565)
• job-info: support LRU cache mapping job id -> owner (#3548)
• python: expand FluxExecutor.submit parameters (#3562)
• broker: add support for PMIx bootstrap (#3537)
• job-ingest: add new plugin-based job validator (#3533)

Cleanup/Testing

• README.md: remove python3-six dependency (#3579)
• clean up disconnect, cancel handlers (#3569)
• broker: drop broker.rundir, select ipc vs tcp using broker.mapping (#3554)
• broker: refactor overlay network send/receive interfaces (#3547)
• github: add a stale issues and PR bot for flux-core (#3544)
• build/test: remove stale heartbeat references (#3535)
• job-info: consolidate watch RPC targets (#3525)
• enhance testsuite reliability on RHEL8/TOSS4 (#3540)

flux-core version 0.24.0 - 2021-02-22

This release features multiple performance enhancements, including the addition of the FluxExecutor Python class which allows rapid, asynchronous submission of jobs.

Fixes

• broker: fix segfault/perf issues when hitting file descriptor limit (#3513)
• module: reduce keepalive message traffic (#3516)
• flux-kvs: fix --help output when not in an instance (#3500)
• flux-kvs: fix help output in nested subcommands (#3497)
• flux-mini: fix --progress counters with job exceptions (#3514)
• portability: fix 32-bit issues (#3507)
• portability: cross compilation fixes for Julia bindings (#3503)
• libflux: restart continuation timeout in flux_future_reset() (#3518)

New Features

• python: add concurrent.futures executor (#3468)
• libflux: add flux_sync_create() (#3524)
• job-manager: allow jobtap plugins to reject jobs (#3494)
• job-manager: support mode=limited (#3473)
• flux-mini: support --urgency values "default", "hold", "expedite" (#3499)
• broker: improve IP address heuristic in PMI bootstrap (#3489)
• flux-mini: add --log and --log-stderr options (#3509)
• use reactor time instead of heartbeats for internal time management (#3519)
• heartbeat: convert to loadable module (#3512)

Cleanup/Testing

• job-info: split into two modules, job-info and job-list (#3510)
• libflux: remove unnecessary flux_future_then() calls (#3520)
• testsuite: cleanup job-manager tests (#3488)
• testsuite: update hwloc-calc usage (#3523)
• ci: add fedora33 docker image for testing (#3498)
• ci: add 32 bit build to github ci checks (#3511)
• ci: explicitly checkout tag if creating a release (#3531)

flux-core version 0.23.1 - 2021-01-27

Fixes

• flux resource: allow drain, undrain, and status to work on any rank (#3486)
• job-manager: fix compilation error on gcc-10 (#3485)
• job-manager: fix uninitialized variable warning in jobtap.c (#3481)

flux-core version 0.23.0 - 2021-01-25

This release adds a job priority plugin framework, enabling the flux-accounting project to set job priorities with a fair share algorithm.

The scheduler protocol (RFC 27) and libschedutil convenience API have changed, therefore users of flux-sched must upgrade to 0.15.0.

New features

• jobtap: prototype job-manager plugin support (#3464)
• flux-mini: add bulk job submission capabilities (#3426, #3478)
• job-manager: send updated priorities to schedulers (#3442)
• job-manager: support job hold and expedite (#3428)

Fixes

• connectors/ssh: forward LD_LIBRARY_PATH over ssh when set (#3458)
• python: fix use of Flux.reactor_run() from multiple threads (#3471)
• python: misc. fixes to docstrings and argument names in bindings (#3451)
• python: fix circular reference in check_future_error decorator (#3437)
• python: fix ctrl-c, re-throw unhandled exceptions in reactor_run() (#3435)
• shell: fix dropped stdout from shell plugins in task.exec callback (#3446)

Cleanup/Testing

• ci: limit asan build to unit tests only (#3479)
• libschedutil: API improvements and priority integration (#3447)
• configure: add switch to allow flux to be built without python (#3459)
• testsuite: remove sched-dummy, migrate testing to sched-simple (#3462)
• testsuite: add debug, workarounds for failures in github actions (#3467)
• test: fix test for installing poison libflux (#3461)
• cleanup: update outdated terminology (#3456)
• Globally standardize spelling of "canceled" (#3443)
• ci: better script portability and other small updates (#3438)
• testsuite: fix invalid tests, cleanup list-jobs, avoid hard-coding (#3436)
• fix github actions on tag push (#3430)

flux-core version 0.22.0 - 2020-12-16

This release resolves an issue introduced in 0.20.0 where Flux would occasionally hang during tear-down on RHEL/CentOS 7. This release should be suitable for use with production workflows on those systems.

System instance development and testing at < 256 node scale is on-going. The system limitations of this release are documented in the Flux Admin Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

New features

• flux-keygen is no longer necessary before starting Flux (#3409)
• Add waitstatus and returncode JobID class and flux-jobs (#3414)
• New flux resource status command (#3351)
• Rename "administrative priority" to "urgency" (#3394)
• Prepare for fair share priority plugin (#3371, #3339, #3350, #3402, #3405, #3404, #3410)
• job-manager: cache jobspec for scheduler, exec (#3393, #3396, #3399)
• python: add bindings for libflux-idset,hostlist (#3341)
• resource: support hostnames for drain and exclude (#3318)
• flux-jobs: Support nodelist in flux-jobs output (#3332)
• flux-jobs: add flux-jobs --stats,--stats-only options (#3419)
• flux-job: Add flux job attach --read-only option (#3320)
• python: add ResourceSet python class (#3406)
• python: allow future.then() variable and keyword args in callbacks (#3366)

Fixes

• Fix job shell segfault when jobspec contains JSON null (#3421)
• job-manager: Fix annotation clear corner case #3418
• broker: fix intermittent hang during instance tear-down on Centos7 (#3398)
• job-exec: log early shell/imp errors (#3397)
• shell: ensure TMPDIR exists for all jobs (#3389)
• misc cleanups & fixups (#3392)
• small fixes: resource memory leak, improve errors, check int size (#3388)
• affinity: use comma separated list format for CUDA_VISIBLE_DEVICES (#3376)
• libjob: repair interoperability with flux-security (#3356)
• job-exec: fixes for multiuser mode (#3353)
• shell: fix issues with CUDA_VISIBLE_DEVICES value (#3317)
• job-manager: handle scheduler disconnect (#3304)
• libjob: always sign owner jobs with the 'none' signing mechanism (#3306)
• libsubprocess: do not allow ref/unref in hooks (#3303)

Cleanup/Testing

• doc: autogenerate python binding docs with Sphinx (#3412)
• testsuite: support level N inception of flux testsuite (#3413)
• github: fix missing docker tag in matrix builds (#3387)
• github: fixes for workflow scripts (#3383)
• ci: move from Travis-CI to GitHub Workflows (#3379)
• docs: add explicit link to man pages section (#3365)
• testsuite: replace loop in t2300-sched-simple.t with helper (#3367)
• docker: install poison flux-core libs, cmds before build and test (#3369)
• libflux: drop flux_dmesg() from public API (#3362)
• testsuite: fix shed-simple test races (#3358)
• build: allow Lua 5.4, drop -lutil, and improve sphinx warning (#3357)
• testsuite: increase resource.monitor-waitup timeout (#3348)
• broker: update log.dmesg to use rpc streaming (#3307)
• testsuite: fix core idsets in resource module tests (#3314)
• t/t2205-hwloc-basic: only use lstopo-no-graphics (#3309)

flux-core version 0.21.0 - 2020-11-04

This release enables resources to be configured in advance when Flux is the native resource manager for a cluster, in lieu of dynamic discovery. For details, refer to the Flux Admin Guide:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

New features

• optparse: don't sort options/subcommands by default (#3298)
• flux-job: Output key options for job info (#3210)
• resource: load resources from config or R, and rework topo discovery (#3265)
• add internal librlist library and flux-R utility for R version 1 (#3276)
• job-info: use job manager journal to track job state (#3254)
• job-manager: support events journal (#3261)
• shell: support stdio buffering options (default stderr: unbuffered) (#3272)
• flux-kvs: Add 'flux kvs eventlog wait-event' subcommand (#3200)
• job-manager: send job annotations to journal instead of publishing (#3236)
• add hostlist library for encoding/decoding RFC29 hostlists (#3247)

Fixes

• broker: convert broker [bootstrap] config to use libhostlist (#3283)
• libflux: Add missing C++ header guards (#3280)
• cmd: display jobid with flux-mini alloc -v, --verbose (#3279)
• python: fix signal handler management in threads (#3266)
• rc1: fix local connector retries (#3301)

Cleanup

• remove flux-hwloc reload command and aggregator module (#3296)
• doc: add flux-jobs(1) examples (#3295)
• job-manager / job-info: misc cleanup (#3246)
• build: increase minimum version of jansson to 2.10 (#3240)
• ci: ensure pylint script fails when lint warnings are produced (#3269)

flux-core version 0.20.0 - 2020-09-30

This release features changes to support Flux as the native resource manager on small (<= 256 node) clusters, for testing only. A draft system administration guide is available at:

https://flux-framework.readthedocs.io/en/latest/adminguide.html

New features

• hwloc: add printing of num GPUs to flux hwloc info (#3217)
• resource: mark nodes down when they are stopped (#3207)
• broker: allow late-joining brokers, execute rc1/rc3 on all ranks (#3168)
• shell/pmi: add improved PMI key exchange mechanism (#3219)

Fixes

• job-manager: communicate job priority changes to job-info (#3208)
• job-info: handle annotations race (#3196)
• python/job: Update state_single default header (#3227)
• libidset: reject idset strings that don't conform to RFC 22 (#3237)
• job-info: handle job-priority changes (#3208)
• doc: list sphinx as a doc dependency in README.md (#3225)
• testsuite: fix race in python SIGINT test (#3224)
• job-manager: fix segfault changing priority of a running job (#3220)
• shell: allow multiple resources per level in jobspec (#3175)
• python: allow Ctrl-C interrupt of Future.get() and wait_for() (#3215)
• shell: use F58/alternate encodings in output file template {{id}} (#3206)
• fallback to ASCII for F58 FLUIDs with FLUX_F58_FORCE_ASCII (#3204)
• rc: load sched-simple only if no other scheduler is loaded (#3177)
• docker: do not install Sphinx via pip in Centos8 image (#3195)
• flux-jobs / python bindings: handle empty string conversions (#3183)

Cleanup

• reduce log noise (#3226)
• flux-comms: remove obsolete command (#3211)

flux-core version 0.19.0 - 2020-08-31

Notable features and improvements in this release include enhanced support for tools/debuggers (e.g. STAT, LaunchMON and TotalView), a new set of --env environment manipulation options for flux-mini(1), better support for listing jobs through the Python API, and a fix for an annoying usability issue with F58 encoded jobids in non-UTF-8 locales.

New features

• switch to utf-8 for subprocess and job io encoding (#3086)
• improve support for shell plugin developers (#3159, #3132)
• flux-mini: add environment manipulation options (#3150)
• flux-mini: add --debug option for tools support (#3130)
• bash: top level command completions for flux (#2755)
• add fluxorama system instance docker image sources (#3031, #3128)
• content-s3: add configuration, support for libs3 variants (#3067, #3115)
• Use F58 JOBIDs in most user-facing commands (#3111)
• broker: state machine refactoring (#3107)
• broker: restore client-side PMI logging (#3105)
• libflux: add flux_module_set_running() (#3104)
• python: Add JobInfo, JobInfoFormat, and JobList classes (#3174)

Fixes

• Fix F58 encoding in non-multibyte locales (#3144)
• job-info,job-shell: allow non-V1 jobspec (#3160)
• build: fix innocuous configure error (#3129)
• travis-ci: fix ARGS when DOCKER_TAG set (#3125)
• doc: fix flux-help(1) output and rendering of NODESET.rst (#3119)
• flux-job: add totalview_jobid support and misc. fixes (#3130)
• small build/test/doc fixes (#3100)
• fix GitHub project license detection (#3089)
• shell/lua.d/openmpi: set env vars to force the use of flux plugins (#3099)
• job-info: do not fail on invalid jobspec / R / eventlog (#3171)
• flux-module: extend first column of flux-module list output (#3178)

Cleanup

• python: split flux.job module into multiple files (#3162)
• python: reformat with latest black formatter, pin black version (#3169)
• libflux: fix comment in module.h to reference readthedocs (#3138)
• Update rfc links to RTD site (#3137)
• remove the simple dynamic string (sds) code from libutil (#3135)
• Doc Cleanup (#3117)
• AUTHORS: remove (#3090)

flux-core version 0.18.0 - 2020-07-29

This release features a more compact default representation for Flux JOBIDs, manual pages converted to ReST format and published on readthedocs.io, and the ability for schedulers to add data to jobs which can be displayed with flux jobs.

New features

• doc: man pages converted to ReST for publication on readthedocs.io (#3033, #3078, #3085)
• Add support for RFC19 F58 encoded JOBIDs (#3045)
• Support user and scheduler job annotations (#3065, #3062, #2960)
• add content-s3, content-files alternate backing stores (#3025, #2992)
• Python interface to 'mini batch' (#3020)

Fixes

• shell: fix bug in cpu-affinity=per-task (#3080)
• flux-hwloc: remove ignore of HWLOC_OBJ_GROUP (#3046)
• cmd: Make label io options consistent (#3068)
• flux-resource list: Allow null/missing key to designate empty set (#3047)
• flux-jobs: small functionality and testing updates (#3060)
• job-manager: avoid segfault on priority change with pending alloc (#3072)

Cleanup

• doc: adjust dependency table to reflect hwloc v2.0+ support (#3053)
• Update terminology to use more inclusive words (#3040)

Testsuite enhancements

• testsuite: remove use of -S option in run_timeout (#3079)
• testsuite: minor valgrind test cleanup (#3077)
• docker: small updates for testenv images, travis builds (#3058)
• travis-ci: add python coverage (#3056)
• travis-ci: Add --localstatedir=/var to docker tag builds (#3050)
• pylint: Update pylint to 2.4.4 (#3035)
• Fix testsuite for Lua 5.3 on Ubuntu 20.04 (#3028)
• docker: really actually fix Ubuntu 20.04 (focal) docker tags (#3027)
• travis-ci: enforce correct configure ARGS for docker tags (#3023)
• travis: tag a docker image for ubuntu 20.04 (#3022)
• python: add stdio properties to Jobspec class (#3019)
• build and test fixes (#3016)

flux-core version 0.17.0 - 2020-06-18

NOTE: Support has been removed for Python 2.

New features

• Improved interface for batch jobs: flux mini batch and flux mini alloc (#2962)
• Pty support for Flux jobs via -o pty shell option (#2894)
• New resource module for monitoring and control of resources, including ability to exclude and drain/undrain ranks. (#2918, #2949)
• New flux resource utility to drain and list resources. (#2949)
• Multiple improvements for flux jobs: colorize output, add "status" and "exception" fields, allow jobids as positional arguments, and add a custom conversion type h for "-" (#2798, #2858, #2902, #2910, #2940, #2926, #2865)
• Support for hwloc v2.0+ (#2944)
• Support for MPIR debugging of jobs (#2654)
• New job-archive module optionally stores job data in sqlite. (#2880)
• single-broker system instance support, including minimal support for restart (archived job information is saved) (#2783, #2820, #2813, #2809)
• Add support for multi-user execution (#2822, #2813)
• Add support for enforcing job time limits (#2995)
• python: Add bindings for job cancel and kill (#2976)
• python: Add bindings for watching job eventlog events (#2986)

Improvements

• support systemctl reload flux (#2879)
• enhance job throughput (#2777, #2792)
• sched-simple: schedule cores instead of PUs by default (#2966)
• broker: send service.disconnect requests on module unload (#2913)
• broker: add interface for monitoring broker liveness (#2914)
• broker: add cleanup phase (#2971)
• broker: only allow userid- services to be registered by guests (#2813)
• libflux: add flux_msg_last_json_error(3) (#2905)
• flux-job: Use common attrs for list cmds (#2901)
• doc: add flux job shell API manpages (#2793)
• job-info: Support "exception" and "success" list attributes (#2831, #2858)
• job-info: improve error responses from various list RPCs (#3010)
• rc: load job-info on rank 0 only (#3009)
• python: remove support for Python 2 (#2805)
• python: cache python wrappers in the class (#2878)
• python: tweaks in preparation for flux-tree-helper (#2804)
• python: add 'flux_job_list_inactive' Python binding (#2790)
• python: allow reactor_run() to be interrupted (#2974)
• config: parse TOML once in broker, share with modules (#2866)
• config: use config file for access policy (#2871)
• docker: add default PS1 that includes flux instance size, depth (#2925)
• docker: start munge in published docker images (#2922)

Fixes

• Fix compilation under GCC 10.1.0 (#2954)
• librouter: avoid dropping messages on EPIPE (#2934)
• README: update documentation link (#2929)
• README.md: fix required Lua version (#2923)
• README: add missing dependencies: aspell-en and make (#2889)
• shell: make registered services secure by default (#2877)
• cmd/flux-kvs: Fix segfault in dir -R (#2847)
• job-exec: drop use of broker attrs, use conf file or cmdline instead (#2821)
• broker: clean shutdown on SIGTERM (#2794)
• flux-ping: fix problems with route string (#2811)
• libsubprocess: don't clobber errno in destructors, handle ENOMEM (#2808)
• Fix flux-job status for jobs with exceptions before start (#2784)
• shell: Add missing R member to shell info JSON object (#2989)
• job-ingest: fix validation of V1 jobspec (duration required) (#2994)
• doc: fixes and updates for idset manpages (#3012)

Cleanup

• removed outdated pymod module (#3008)
• broker and flux-comms cleanup (#2907)
• cmd/flux-kvs: Remove legacy --json options and json output (#2807)
• doc: Fix typos in man pages (#2725)
• libutil: improve out of memory handling, conform to RFC 7 (#2785)
• content-sqlite, content-cache: cleanup and refactoring (#2786)

Testsuite enhancements

• Fix skipped tests in t2205-hwloc-basic.t (#2998)
• t2204-job-info: Split up tests into new files (#2957)
• t/t2800-jobs-cmd: Fix racy test (#2951)
• t: add HAVE_JQ prereq to tests that use jq (#2936)
• sharness: fix TEST_CHECK_PREREQS for tests using $jq (#2939)
• job-info: module & test cleanup (#2932)
• testsuite: add ability to ensure programs are used under appropriate prereqs (#2937)
• ensure unit tests do not link against installed flux libraries (#2917)
• t2204-job-info: Fix racy tests (#2862)
• test rehab: new flexible run_timeout, speeding up asan, and many more timeouts and test repairs (#2849)
• Mypy: add static type checking for python to travis (#2836)
• testsuite: minor fixes and slight improvements (#2842)
• README: update Travis CI badge after transition to travis-ci.com (#2843)
• tests: timeout in automake harness (#2840)
• t/t0005-exec: Increase timeout lengths (#2828)

flux-core version 0.16.0 - 2020-02-24

New features

• job-info: fix ordering of pending jobs (#2732)
• job-info: add list-id service for race-free listing of 1 jobid (#2720)
• sched-simple: add unlimited alloc mode (#2726)
• flux-module: add flux module reload subcommand (#2736)
• flux-queue: add flux queue idle subcommand (#2712)

Improvements

• broker: rework shutdown: rc3 no longer under grace-time timeout (#2733)
• broker: log dropped responses sent down overlay (#2761)
• libflux: fulfill empty "wait_all" futures immediately (#2714)
• libflux: allow anonymous futures in flux_future_push(3) (#2714)
• shell: report meaningful exit codes for ENOENT, EPERM & EACESS (#2756)
• flux-jobs: refactor using new JobInfo and OutputFormat classes (#2734)
• python: accept integer job duration (#2702)
• python: switch from flags to boolean args in job.submit(), submit_async() (#2719)
• python: return derived JobListRPC and JobWaitFuture objects from job.job_list and job.wait,wait_async for a better interface (#2753)

Fixes

• broker: fix bootstrap under openpmix PMI-1 compat library (#2748)
• broker: mute modules during unload to avoid deadlock (#2710)
• libflux: block flux_send() during handle destruction (#2713)
• job-ingest: fixes for validation worker management (#2721, #2716)
• build: fix compilation errors on clang < 6.0 (#2742)
• testsuite: fix tests when run under Slurm and Flux jobs (#2766)
• testsuite: fix for hangs in tests using rc3-job (#2744)
• doc: fix URI format in flux-proxy(1) manpage (#2747)

flux-core version 0.15.0 - 2020-02-03

Summary:

This release fixes a critical issue (#2676) with flux module remove in flux-core-0.14.0 that causes rc3 to fail when flux-core is integrated with flux-sched.

New features

• flux-job: add raiaseall, cancelall, killall (#2678)
• flux-queue: new command to control job queue (#2659, #2687)
• flux-jobs: support listing nnodes and ranks (#2656, #2705)

Improvements

• shell: expand lua api to improve error handling in shell rc scripts (#2699)
• shell: improve error messages to users on exec failures (#2675)
• flux-job: (attach) fetch log messages even when shell init fails (#2691)
• flux-job: (attach) add -v option (adds file,line log messages) (#2691)
• flux-job: (list) make filtering options match flux jobs (#2639)
• flux-job: (list) make JSON output the default (#2636)
• flux-job: (drain,undrain) drop subcommands (see flux queue) (#2659)
• job-info: transition state after retrieving data from KVS (#2655)
• job-info: add checks in sharness test to avoid racyness (#2666)
• job-info: rename attributes to ease parsing (#2643)
• flux-jobs: add --from-stdin option and other small fixes (#2648)
• python: allow JobspecV1 to accept 0 gpus_per_task (#2701)
• optparse: always display --help usage first in command help output (#2691)
• libflux: add message cred helpers (#2670)
• github: check flux-sched@master against submitted flux-core PRs (#2680)

Fixes

• shell: fix bad exit from mvapich rc script, avoid flux.posix in rcs (#2699)
• shell: fix race between stdin/out readers and eventlog creation (#2688)
• shell: install shell.h: the public api for shell plugins (#2690)
• shell: chdir() into current working directory (#2682)
• rc: improve rc3 reliability, add flux module remove -f option (#2676)
• testsuite: fix unsafe getenv in libpmi tests, /tmp usage in sharness (#2669)
• job-manager: fix counting problem that leads to scheduler sadness (#2667)

flux-core version 0.14.0 - 2020-01-12

Summary:

This version of flux-core improves the reliability and performance of the new execution system, and fills gaps in the previous release. Some highlights are:

• support for jobs reading standard input
• improved job listing tool - see flux-jobs(1)
• improved python support for building jobspec and waiting for job completion
• ability to override job names displayed in listing output

New features

• Add porcelain flux jobs command (#2582)
• job-info: use basename of arg0 for job-name (#2598)
• job-info: honor max_entries option in job-info.list (#2596)
• job-info: Support task-count in listing service (#2580)
• Support job state times in job listing service (#2568)
• python: add jobspec classes to main bindings (#2534)
• initial job-name support (#2562)
• job-manager: add flux_job_wait() (#2546)
• shell: add support for debugger synchronization and MPIR_proctable gather (#2542)
• job-info: Add stats for number of jobs in each state (#2540)
• job-info: re-load job state from KVS (#2502)
• libflux: add flux_get_conf() (#2501)
• job-info: Store full job-history, allow users to query pending, running, and inactive jobs (#2471)
• Initial shell stdin support (#2448)

Improvements

• libflux/mrpc: drop the mrpc class (#2612)
• docker: add image and travis tests on CentOS 8 (#2610)
• mergify: do not auto-merge PRs with invalid commits (#2603)
• broker: new format for [bootstrap] configuration (#2578)
• broker/boot_config: use new config file interfaces (#2524)
• shell: add unpack-style helpers for get_info shell plugin api calls (#2573)
• testing/asan: enable asan in test framework and travis-ci (#2466)
• README.md: update build docs for Python 3 (#2565)
• Update jobspec command key per RFC 14 changes (#2564)
• replace exec "running" event with "shell.init" and "shell.start" (#2541)
• shell: improve stdout/stderr performance (#2531)
• modules/job-manager: [cleanup] simplify queue listing and refactor internal context (#2536)
• kvs: improve append performance (#2526)
• shell: generate job exception on MPI_Abort (#2510)
• msg_handler: make topic_glob const char *, fix fallout (#2496)
• libflux: fall back to builtin connector search path (#2489)
• README: minor source cleanup (#2509)
• shell: implement shell-specific log facility, add support for log events to output eventlog (#2477)
• flux-mini: improve handling of --setattr and --setopt (#2495)
• bindings/python: reinstate python2 support (#2482)
• bindings/python: change minimum python version to 3.6 (#2452)
• libutil: replace fdwalk with version that uses getdents64 (#2479)
• flux-shell: handle jobspec command as bare string (#2484)
• librouter: factor common code from connector-local, flux-proxy (#2354)
• mergify: fix rule that prevents merging of "WIP" PRs (#2453)
• buffer: start buffer at 4K and grow to 4M as necessary (#2449)
• libioencode: make rank parameters strings (#2441)
• flux-kvs: Add eventlog namespace option (#2439)
• testsuite: fix LONGTEST and other small improvements (#2444)
• job-ingest: switch to v1 schema (#2433)
• libtomlc99: update for TOML v0.5.0 support #2619
• job-ingest: switch to a py bindings based jobspec validator (#2615)

Fixes

• flux-job: misc fixes for attach (#2618)
• fix minor issues found by lgtm scan (#2605)
• broker: increase nofile limit to avoid assertion failure in zuuid_new() (#2602)
• use libuuid instead of zuuid (#2606)
• github: enable a workflow to validate commits in a PR (#2586)
• python: fix circular reference in Future class (#2570)
• have future take a ref on flux_t handle (#2569)
• bindings/python and libev: work around future leak (#2563)
• kvs: Fix duplicate append corner case (#2555)
• shell: stdin write to exited task should not cause fatal job exception (#2550)
• job-manager: fix internal job hash lookup error handling (#2552)
• shell: fix segfault if logging function is called in or after shell_finalize() (#2544)
• kvs: fix memory use-after-free corner case (#2525)
• t: fix tests prone to races or timeouts on constrained systems (#2523)
• job-exec: fix memory errors detected by valgrind (#2521)
• test: fix random cronodate test failure (#2520)
• t1004-statwatcher: fix test on Ubuntu 19.10 (#2513)
• job-ingest: launch .py validators with configured python (#2506)
• doc: flux_respond_raw doesn't take an errnum (#2504)
• Fix infinite recursion when wrapper.Wrapper object initialized with incorrect args (#2485)
• sched-simple: fix rlist_alloc_nnodes() algorithm (#2474)
• fix crash in is_intree() with EACCESS or ENOENT from builddir (#2468)
• testsuite: extend some testing timeouts (#2451)

flux-core version 0.13.0 - 2019-10-01

Summary:

This version of flux-core enhances the new execution system to near full functionality, including new tools for job submission, better MPI support, task and GPU affinity options, and flexible job output handling including redirection to bypass the KVS. A powerful shell plugin infrastructure allows execution features to be selectively enabled by users.

See flux-mini(1) for more info on the new job submission interface.

Some deficiencies present in this release:

• flux job list doesn't show inactive jobs
• no per-task output redirection
• output is space-inefficient in KVS (base64 encoding, one commit per line)
• no stdin redirection
• need better shell task cleanup and early task exit detection
• no debugger support (MPIR)

New features

• flux-mini: new run/submit interface (#2409, #2390)
• flux-version: make flux -V,--version an alias, add manpage (#2412, #2426)
• shell: add gpu affinity support (#2406)
• shell: add builtin core affinity plugin (#2397)
• shell: Support stdout/stderr redirect to a file (#2395)
• shell: add support for plugins and shell initrc (#2376, #2392, #2357, #2335)
• shell: flush output to KVS on every line (#2366, #2332)
• shell: limit the number of I/O requests in flight (#2296)
• shell: use RFC 24 eventlog output (#2308)
• flux-job attach: add timestamps, --show-exec option (#2388)
• libioencode: convenience library for encoding io (#2293)
• libsubprocess: add start/stop for streams (#2271, #2333)
• libsubprocess: add flux_subprocess_kill() (#2297)
• job-info: development in support of job output (#2341, #2374, #2360, #2303, #2307)
• flux-in-flux: flux --parent option, add instance-level, jobid broker attributes (#2326, #2362)
• flux-in-flux: set local_uri, remote_uri in enclosing instance KVS (#2322)

Improvements

• libflux/reactor: add flux_reactor_active_incref(), _decref() (#2387)
• libflux/module: add flux_module_debug_test() (#2373)
• libschedutil: export library for use by flux-sched and others (#2380)
• libschedutil: destroy pending futures on scheduler unload (#2226)
• libflux/message: drop flux_msg_sendfd(), _recvfd() from API (#2375)
• libflux/message: add flux_msg_incref() and _decref() (#2334)
• libflux: update message dispatch to support routers (#2367)
• libflux/buffer: increase efficiency of line buffered I/O (#2294)
• libsubprocess: cleanup ( #2343, #2286)
• testsuite improvements (#2404, #2400)
• build system cleanup (#2407)
• documentation cleanup (#2327)
• abstract in-tree detection into libutil (#2351)
• libjob: flux_job_kvs_namespace() (#2315)

Fixes

• build: bump libflux-core.so version to 2 (#2427)
• sched-simple: reject requests with unknown resource types (#2425)
• restore libpmi2 to support MPICH/MVAPICH configured for slurm pmi2 (#2381)
• broker: avoid accidentally consuming % format characters in initial program args (#2285)
• connector-local: suppress EPIPE write errors (#2316)
• libidset: fix idset_last() at size=32 (#2340, #2342)
• connectors/loop: do not accidentally close STDIN (#2339)
• job-exec: fix exception handling of jobs in transition states (#2309)
• broker: don't read FLUX_RCX_PATH to set rc1,rc3 paths (#2431)
• job-ingest: validator shebang can pick the wrong python (#2435)

flux-core version 0.12.0 - 2019-08-01

Summary:

This version of flux-core replaces the old execution prototype, "wreck", with a new job submission and execution protocol. The new system does not yet have support for all the features of the prototype, however it is capable of running jobs specified in version 1 jobspec format with an advanced and performant job submission API.

For early adopters:

• To generate jobspec, see flux jobspec
• To submit jobspec, see flux job submit
• Instead of flux wreckrun try flux srun
• Instead of flux wreck ls try flux job list
• Instead of flux wreck kill/cancel try flux job kill/cancel
• Job events are recorded detailed eventlog, see flux job eventlog <id>
• Experience job synchronization with flux job wait-event
• Attach to submitted jobs with flux job attach
• Want info about a job? Try flux job info
• Waiting for all jobs to complete? Try flux job drain

New Features:

• new job submit api and flux job submit command (#1910, #1918)
• add job exception and cancellation support (#1976)
• support validation for submitted jobspec (#1913, #1922)
• add flux jobspec jobspec generation script (#1920, #1964)
• add a simple default node/core fcfs scheduler, sched-simple (#2038, #2053, #2203)
• add flux job info, eventlog, wait-event, attach (#2071, #2085, #2098, #2112, #2114, #2115, #2137, #2142, #2269, #2084)
• add flux job drain (#2092)
• add flux-shell, the flux job shell (#2211, #2240, #2246, #2244, #2278)
• add flux srun (#2179, #2227)

Improvements:

• libsubprocess updates (#2158, #2152, #2167, #2174, #2230, #2254, #2262, #2265)
• job-manager: add exec and scheduler interfaces, add job state machine: (#2025, #2031, #2067, #2068, #2077, #2146, #2198, #2231)
• job-manager: add state transition events (#2109)
• job-manager: other improvements (#2047, #2062)
• replace resource-hwloc module (#1968)
• standardize parsing of duration in most tools (#2095, #2216)
• add guest support to barrier module (#2215)
• add broker rundir attribute (#2121)
• kvs: remove namespace prefix support (#1943)
• kvs: support namespace symlinks (#1949)
• kvs: new kvs namespace command (#1985)
• python: add futures support (#2023)
• improve signature of flux_respond and flux_respond_error (#2120)

Fixes

• misc build and test system fixes (#1912, #1914, #1915, #1925, #1941, #2004, #2014, #2019, #2022, #2028, #2034, #2037, #2058, #2104, #2133, #2124, #2177, #2221, #2128, #2229)
• misc flux-broker fixes (#2172, #2178, #2175, #2181, #2194, #2197,
• misc kvs fixes (#1907, #1936, #1945, #1946, #1966, #1949, #1965, #1969, #1971, #1977, #2011, #2016, #2018, #2056, #2059, #2064, #2126, #2130, #2136, #2138)
• remove kvs classic library (#2017)
• misc python fixes (#1934, #1962, #2046, #2218)
• misc libflux-core fixes (#1939, #1942, #1956, #1982, #2091, #2097, #2099, #2153, #2164)
• do not version libpmi*.so (#1992)
• ensure system python path is not pushed to front of PYTHONPATH (#2144)
• flux-exec fixes: (#1997, #2005, #2248)
• libpmi fixes (#2185)
• libidset fixes (#1928, #1975, #1978, #2060)
• jobspec fixes and updates (#1996, #2081, #2096)
• other fixes (#1989, #2090, #2151, #2280, #2282)

flux-core version 0.11.0 - 2019-01-03

Fixes

• flux-module: increase width of size field in list output (#1883)
• kvs: return errors to callers on asynchronous load/store failures (#1836)
• flux-start: dispatch orphan brokers, fully clean up temp directories (#1835)
• flux-exec: ensure stdin is restored to blocking mode on exit (#1814)
• broker: don't connect to enclosing instance (#1798)
• flux (command): handle inaccessible build directory, fix PATH issue (#1683)
• wreck: fix incorrect error handling in job module (#1617)
• libflux: improve efficiency of asynchronous futures (#1840)
• libflux: fix composite future implementation (#1791)
• libflux: improve lookup efficiency of RPC message handlers (#1807)
• libflux: give all aux set/get interfaces uniform semantics (#1797)
• update to libev 4.25, ensure valgrind runs clean on i686 (#1898)

New Features

• license: re-publish project under LGPLv3 (#1829, #1788, #1901)
• wreck: use direct stdio transport, unless -okz option (#1875, #1896, #1900)
• wreck: add new -J, --name=JOBNAME option to flux-wreckrun and submit (#1893)
• libflux: support queue of future fulfillments (#1610)
• libflux: support dynamic service registration (#1753, #1856)
• kvs: replace inefficient KVS watch implementation and outdated API (#1891, #1890, #1882, #1878, #1879, #1873, #1870, #1868, #1863, #1861, #1859, #1850, #1848, #1820, #1643, #1622)
• job: add job-ingest, job-manager modules, and API (experimental) (#1867, #1774, #1734, #1626)
• libidset: expand API to replace internal nodeset class (#1862)
• libflux: add KVS copy and move composite functions (#1828)
• libflux: access broker, library, command versions (#1817)
• kvs: restart with existing content sqlite, root reference (#1800, #1812)
• python: add job & mrpc bindings (#1757, #1892)
• python: add flux python command to run configured python (#1766)
• python: add flux-security bindings (#1716)
• python: Python3 compatibility (#1673)
• kvs: add RFC 18 eventlog support (#1671)
• libsubprocess: cleanup and redesign (#1713, #1664, #1659, #1658, #1654, #1645, #1636, #1629)
• libflux/buffer: Add trimmed peek/read line variants (#1639)
• build: add library versioning support (#1874)
• build: add support for asciidoctor as manpage generator (#1650, #1676)
• travis-ci: run tests under docker (#1688, #1684, #1670)

Cleanup

• libflux: drop broker zeromq security functions from public API (#1846)
• libflux: clean up interface for broker attributes (#1845)
• libflux: drop reduction code from public API (#1844)
• libutil: switch from munge to libsodium base64 implementation (#1786)
• python: python binding is no longer optional (#1772)
• python: add "black" format check, and reformat existing code (#1802)
• python/lua: avoid deprecated kvs functions (#1748)
• kvs: misc cleanup, refactoring, and fixes (#1805, #1813, #1773, #1764, #1712, #1696, #1694)
• broker: drop epgm event distribution (and munge dependency) (#1746)
• content-sqlite: switch from lzo to lz4 (#1740)
• libpmi: drop PMIx client support (#1663)
• libpmi: avoid synchronous RPCs in simple-server kvs (#1615)
• modules/cron: misc cleanup (#1657)
• RFC 7: fix various style violations (#1705, #1717, #1706, #1611)
• gcc8: fix output truncation (#1642)
• sanitizer: fix memory leaks (#1737, #1736, #1739, #1737, #1735, #1733)
• build: misc. cleanup and fixes (#1886, #1795, #1824, #1827, #1701, #1678)
• test: misc. cleanup and fixes (#1644, #1704, #1691, 1640)

flux-core version 0.10.0 - 2018-07-26

Fixes

• fix python kz binding errors (#1537)
• fix default socket path and config file parsing for flux-broker (#1577)
• Lua 5.2 compatibility and other Lua fixes (#1586, #1594)
• flux PMI server response before closing (#1528)

New Features

• support cpu affinity for wreck jobs (#1533, #1603)
• support for GPU device discovery through hwloc (#1561)
• set CUDA_VISIBLE_DEVICES for jobs with GPUs (#1599)
• add ability to bootstrap Flux using pmix (#1580)
• add flux wreck sched-params cmd to tune scheduler at runtime (#1579)
• support -o mpi=spectrum for spectrum MPI launch (#1578, #1588)
• allow generic JSON values in aggregator (#1535)
• new --wrap=arg0,arg1 option to flux-start (#1542)
• allow arbitrary error strings in RPC responses (#1538)
• support for composite flux_future_t types (#1553)
• add buffered I/O support to Flux API (#1518, #1547, #1548)
• remove extra line breaks in Flux log messages (#1530)
• add Flux Locally Unique ID (FLUID) implementation (#1541)

Cleanup

• remove json-c (#1522, #1524, #1525, #1527, #1529)
• libidset internal cleanup (#1521)
• libsubprocess cleanup (#1549)
• drop PMIx heuristic in libpmi (#1575)
• add missing #!/bin/bash to all rc1 scripts (#1597)

flux-core version 0.9.0 - 2018-05-10

Fixes

• numerous memory leak fixes (#1494, #1322)
• better support for C++ code (#1225, #1223, #1204)
• massive scalability improvement for libkz readers (#1411, #1424)
• increase job submission throughput (#1472, #1389)
• reduce amount of information collected in resource-hwloc to enhance large instance startup (#1457)
• i686 portability fixes (#1296)
• fixes for flux-kvs dir and ls usage (#1444, #1452)
• fix for clock_gettime workaround in Lua bindings (#1371)
• update minimum libhwloc to 1.11.1 to avoid assertion failure (#1478)
• fix incorrect output from option parsing when invalid short option is grouped with valid options in many commands (#1183)
• fix thread cancellation in sqlite module (#1196)
• fix segfault on 32bit systems in cron module (#1178)
• log errors from event redistribution (#1457)
• increase number of open files in wrexecd (#1450)
• fix job hangs during final task IO output flush (#1450)
• fixes for flux-wreck purge (#1357)
• scalability fixes for flux-wreck subcommands (#1372)
• general reduction in log messages at INFO level (#1450)
• improve valgrind.h detection (#1502)
• fix pkg-config pc name for liboptparse (#1506)
• fix flux executable run-from-build-tree auto-detection (#1515)

New Features

• support config file boot method for broker (#1320)
• new flux-kvs ls command (#1172, #1444)
• new kvs transaction API (#1346, #1348, #1351)
• support for KVS namespaces (#1286, #1299, #1316, #1323, #1320, #1327, #1336, #1390, #1423, #1432, #1436)
• support for node inclusion,exclusion via flux-wreck command (#1418)
• initial parser for jobspec (#1201, #1293, #1306)
• store child instance URI in enclosing instance (#1429)
• new flux-wreck uri command to fetch child instance URIs (#1429)
• additional states from kvs module (#1310)
• append support for KVS values (#1265)
• support multiple blobrefs per valref in kvs (#1227, #1237)
• add flux_kvs_lookup_get_raw(3) (#1218)
• add flux_kvs_lookup_get_key(3) (#1414)
• add flux_event_publish(3) to libflux API (#1512)
• support for composite futures in libflux (#1188)
• add flux_future_reset(3) to support multi-response RPCs (#1503)
• new libflux-idset library (#1498)
• support raw payloads in flux-event (#1488)
• add raw encode/decode to flux_event_* API (#1486)
• introduce R_lite format for job allocation description (#1399, #1485)
• new flux-hostlist command for listing hostnames for jobs (#1499)
• new flux-wreck environment manipulation commands (#1405)
• flux-wreck ls returns active jobs first (#1481)
• flux-wreck tools allow filtering on active,inactive jobs (#1481)
• flux-wreckrun will now block until job is scheduled by default, use the new --immediate flag to get old behavior (#1399)
• add flux-wreck cancel command to cancel pending job (#1365, #1367, #1385)
• add flux-wreck dumplog command to dump error log for jobs (#1450)
• add new KZ_FLAGS_NOFOLLOW flag to avoid blocking when no data in a kz file (#1450)
• add -n, --no-follow option to flux-wreck attach (#1450)
• propagate gpu and cores information for flux-wreckrun and submit (#1399, #1480)
• use cmb.exec service to launch wrexecd, not direct exec (#1508)
• new completing state for jobs (#1513)
• support job epilog pre-complete and post-complete scripts (#1513)
• support output to stderr with flux_log functions (#1192)

Cleanup

• kvs: major cleanup (#1154, #1177, #1182, #1190, #1214, #1213, #1233, #1235, #1242, #1243, #1244, #1246, #1248, #1253, #1257, #1262, #1263, #1268, #1269, #1273, #1274, #1276, #1279, #1300, #1301, #1304, #1308, #1309, #1301, #1314, #1315, #1321, #1329, #1339, #1342, #1343, #1347, #1349, #1353, #1383, #1402, #1404, #1440, #1458, #1466, #1477)
• kvs: improved test coverage (#1291)
• Add const to message payload accessor functions (#1212)
• rename flux_mrpcf, flux_mrpc_getf to flux_mrpc_pack,unpack (#1338)
• cleanup bulk message hanglers in libflux (#1277)
• minor flux_msg_handler cleanup (#1171)
• broker: cleanup to prepare for dynamic service registration (#1189)
• broker: general cleanup (#1230, #1234, #1241)
• Change key lwj to jobid in all jsc/wreck messages (#1409)
• libjsc cleanup (#1374, #1395, #1509)
• testsuite updates (#1167, #1175, #1313, #1464, #1266)
• Internal libutil and libflux cleanup (#1319, #1283, #1229, #1231, #1166)
• build system cleanup (#1163, #1354, #1184, #1200, #1275, #1252)
• disable pylint by default (#1255, #1258)
• partial migration from json-c to jansson (#1501, #1508)
• drop unused ev_zlist composite watcher (#1493)

flux-core version 0.8.0 - 2017-08-23

Fixes

• libflux: remove calls to functions that exit on error (#1060)
• fix flux_reactor_run() to return active watcher count (#1085)
• fix flux path detection when install path contains symlinks (#1122)
• lua: fix refcount bug in kvs bindings (#1116)
• kvs: oom() fixes (#1124, #1128)
• kvs: Fix forced dirty bit clear error (#1133)
• kvs: fix invalid memory read (#1065)
• kvs: directory walk return error fixes (#1058)
• kvs_classic: fix kvs(dir)_put_double (#1114)
• fix memory leaks detected by valgrind (#1076)
• avoid deadlock when unloading connector-local module (#1027)
• fix several arm7l portability issues (#1023)
• optparse: test and allow adjustment of posixly-correct behavior (#1049)
• Small improvements for systemd unit file and install paths (#1037)
• fix small leak in flux cmd driver (#1067)

New Features

• add FLUX_MSGFLAG_PRIVATE and allow guests to content load/store (#1032)
• allow guests to access hwloc topology (#1043)
• libflux: new flux_future_t API (#1083)
• libflux: implement RPCs in terms of futures (#1089)
• kvs: implement transaction objects (#1107)
• connector-local: Fix compiler warning (#1031)
• add optional initial program timeout, for test scripts (#1129)
• libutil: new dirwalk interface (#1072, #1061, #1059)
• connector-local: add exponential backoff to connect retry count (#1148)
• support tbon.endpoint and mcast.endpoint attributes (#1030)
• content: allow hash type to be configured (#1051)

Cleanup

• update many broker attribute names (#1042)
• consolidate installed libraries and source tree cleanup (#1095)
• convert broker from json-c to jansson (#1050)
• libflux: rename jansson pack/unpack-based Flux API functions (#1104)
• kvs: various code cleanup (#1057, #1073, #1079, #1099, #1119, #1123, #1153)
• kvs: refactor kvs commit, lookup, and walk logic (#1066, #1105)
• kvs: drop unused, legacy and deprecated functions (#1100, #1116)
• kvs: switch from json-c to jansson (#1108, #1153)
• Misc Cleanup/Minor Fixes from KVS TreeObject Work (#1152)
• cron: avoid use of json-c and xzmalloc (#1143)
• Change void * to void ** in flux_msg_get_payload (#1144)
• python: make bindings compatible with newer versions of pylint (#1113)
• barrier: cleanup (#1092)
• tweak watcher structure, add external watcher construction interface (#1082)
• drop coprocess programming model (#1081)
• split flux_mrpc() out to its own class (#1080)
• deprecate some libutil classes (#1047)
• cleanup of flux_msg_copy(), flux_rpc_aux_set() etc. (#1056)

Testing

• update sharness version to upstream 1.0.0 version (#1035)
• cleanup kvs tests (#1149)
• mitigate slow builds in Travis-CI (#1142)
• fix --chain-lint option in sharness tests (#1125)
• t2000-wreck.t: fix intermittent failures (#1102, #1109)
• kvs: Add json_util unit tests (#1106)
• run valgrind if available as part of make check (#1076, #1098)
• add FLUX_PMI_SINGLETON env variable to avoid SLURMs libpmi in valgrind test (#1091)
• other test improvements (#1087)
• update soak test for recent flux changes (#1072)
• test/security: Fix test corner case (#1029)

Documentation

• add missing manpages, minor manpage fixes (#1045)
• improve reactor documentation (#1086)
• Code comments and documentation cleanup (#1138)

flux-core version 0.7.0 - 2017-04-01

Fixes

• Improve reliability of module unloading (#1017)
• Update autotools for make dist to support newer arches (#1016)
• Fix corner cases in resource-hwloc module (#1012)
• Ensure destructors are called during broker shutdown (#1005)
• flux-logger(1) and flux_log(3) can return error (#1000)
• Fix balancing of Caliper hooks in RPC calls (#991)
• Fix missed errors in subscribe/unsubscribe on local connector (#994)
• sanitize log entries before they enter circular buffer (#959)
• Do not send wreck.state.complete event before job archival (#955)
• Update embedded libev to 4.24 (#944)
• Propagate argument quoting properly in flux-start and flux-broker (#931)
• Fixes and improvements in liboptparse (#922, #927, #929)
• Tighten up PMI implementation for OpenMPI (#926)

New Features

• Allow user other than instance owner to connect to an instance (#980)
• Systemd support, default run directory and URI for system instance (#992, #995)
• New --bootstrap option to flux-start (#990)
• New KVS_NO_MERGE flag in kvs commit and fence operations (#982)
• Add broker.pid to broker attributes (#954)
• flux start only execs broker if --size is not specified (#951)
• Add pkg-config package for Flux PMI (#921)

Cleanup

• Remove live module (#1003)
• Remove flux-up and flux-topo (#960)
• Transition away from deprecated czmq classes (#1013)
• Re-architect and improve many internal and cmd rpc functions (#1002, #1009)
• Other major and minor cleanup (#919, #928, #941, #940, #942, #954, #969, #976, #981, #978, #986, #990, #1001, #1008)
• Remove cmb. prefix from broker services (#947)

Testing

• Expand and improve unit and system tests for greater code coverage (#937, #942, #979, #985, #991, #1004, #1011, #1013, #1014)
• Fix documentation spellcheck (#1015)
• Add dependency on "all" to top-level make check (#970)
• Add flake8/pylint checks (#816)

Documentation

• Improve flux_reactor_create documentation (#970)
• Update flux_msg_cmp(3) and flux_recv(3) to match flux_match changes (#946)
• Update flux-submit(1) and flux-wreckrun(1) manpages (#945)

flux-core version 0.6.0 - 2016-11-29

Fixes

• Fixes for ATS testsuite compatibility (#914)
• python: install kz bindings file (#895)
• broker: adjust errno response to "upstream" request on rank 0 (#913)
• Fix for possible unconstrained memory growth in modules/libjsc (#891)
• Fix error message on flux-help failure (#887)
• Issue fatal error in wrexecd for invalid tasks on node (#901)
• Fix barrier protocol incompatability with older jansson versions (#889)

New Features

• Add a flux content service API (#903)
• Enhance option parsing library for thread safety and new features (#908, #910, #911)
• Add flux_rpcf_multi() (#909)
• Add new "any" and "upstream" nodeset options (#909)
• Add HostName key in resource-hwloc by_rank directory to allow easy resolution of rank to hostname in a flux session (#892)
• Add -d option to flux-kvs dir, dirat, and watchdir to restrict output to key only. (#896)

Cleanup

• flux-ping refactor and cleanup (#898, #904)
• Check expected size of json_int_t during configure (#902)
• Other various cleanup, refactoring and testing updates.

flux-core version 0.5.0 - 2016-10-27

• barrier module cleanup and debug logging (#885)
• Various minor cleanup and documentation updates (#886)
• use jansson >= 2.6 and document JSON payload functions (#884)
• fix MANPATH for Ubuntu, and tidy up travis dep builder (#877)
• fixes for minor issues detected by Coverity (#876)
• build: add --disable-docs configure option (#871)
• kvs: allow get_double to be called on an int (#872)
• README.md: Update srun instructions (#867)
• misc minor fixes (#862)
• make flux_msg_t a bonafide type, add jansson payload accessors (#857)
• Fix --rank issues, add NODESET documentation, and minor cleanup (#860)
• Fix output errors with flux up --comma & --newline, add appropriate tests (#858)
• Add hierarchical lwj directory support in kvs (#811)
• doc/man1/flux-start.adoc: Fix example option usage (#852)
• add dlopen RTLD_DEEPBIND flag (#849)
• src/broker/broker.c: Fix typo flux_repond -> flux_respond (#851)
• doc/man1/flux-module.adoc: Fix environment variable error (#850)
• Pull in json-c, allowing internals to link against alternate json libraries. (#835)
• Add enhanced flux_rpc functions using libjansson json_pack/unpack functions
• Update flux_t * references in man pages (#844)
• Remove pointer from typedef flux_t (#841)
• Remove JSON typedef, just use json_object * (#832)
• module: Remove pointer from typedef flux_modlist_t (#831)
• security: Remove pointer from typedef flux_sec_t (#830)
• and related functions (#824)
• experimental aggregator module (#787)
• kvs: testing, fix use-after-free, streamline python bindings (#823)
• Fix #821: crash in kvs due to NULL arg in Jget_str() (#822)
• python: add a check for invalid handle types (#819)
• Python json and constant rework (#799)
• Python destructor refactoring and exception safety (#807)
• libutil/veb: quiet uninitialized variable warning in vebnew (#809)
• when tagpool is exhausted, grow up to RFC 6 limits (#806)
• add KVS blobref access functions (#801)
• Fix missing error checks in Lua bindings, flux-wreckrun, flux-wreck (#804)
• python: Several fixes for the bindings (#794)
• Switch lua scripts to use lua interpreter in PATH (#789)
• restructure kvs commit handling code for correctness (#788)
• broker/hello: fix leak/error detection in flux_rpc (#786)
• implement scalable reduction for wireup protocol (#781)
• wreck: minor enhancements for scale testing (#782)
• increase KVS commit window (#780)
• autogen.sh: run libtoolize before autoreconf (#771)
• clean up LOG_INFO output, log wireup, rc1, rc3 times, add pmi timing. (#769)
• optparse: remove requirement for option key on long-only options (and other fixes) (#768)

Testing

• add test to verify KVS int can be read as double (#878)
• travis-ci: minor updates (#865)
• jsc test: Add timed waits to avoid races (#859)
• t/t0005-exec.t: Fix corner case in test for file not found (#848)
• Fix make distcheck (#847)
• t/t2000-wreck.t: Fix invalid compare on per-task affinity test (#837)
• t/t2000-wreck.t: Fix invalid compare on 'wreckrun: --input=0 works' test (#836)
• travis.yml: Fix ANCHOR definition (#767)

flux-core version 0.4.1 - 2016-08-12

• python kvs_watch() fix (#759)

• include man7 in distribution (#762)

flux-core version 0.4.0 - 2016-08-11

Scalability improvements

• don't store broken-down hwloc topology in the KVS (#716)

• route rank-addressed requests via TBON (#689)

• streamline matchtag handling (#687)

• keep active jobs in a separate KVS namespace from "archived" jobs (#609)

New features

• implement PMI-1 simple server in wrexecd (#706)

• add skeletal PMI-2 library (based on PMI-1) (#747)

• make libflux-optparse.so available externally (#702)

• asynchronous KVS fence and rewritten fence path in KVS module (#707, #729)

• flux-cron, a cron/at-like service (#626)

• flux-proxy and ssh:// connector (#645)

Other changes

• Use RFC 5424 log format for internal logging, not ad hoc JSON (#691)

• Add wreck lua.d MPI personalities (#669, #743, #747)

• Improved command line for launching flux from slurm/flux (#658)

• Assorted code cleanup.

• Automatic github release upload on tags (#744)

Deprecations

• Sophia content backing store module (#727)

• mrpc KVS based muti-RPC interface (#689)

• ZPL config file (#674)

• Ring overlay network (#689)

Testing

• Print backtraces for any core files generated in travis-ci (#703)

• Add cppcheck target to travis-ci (#701)

• configure --enable-sanitizer for AddressSanitizer, ThreadSanitizer (#694)

• caliper based profiling (#741)

• coverage uploaded to CodeCof (#751)

• improved test coverage

flux-core version 0.3.0 - 2016-04-26

• Add support for launching Intel MPI, OpenMPI using PMIv1. Use the broker circular log buffer for PMI tracing.

• Add flux wreck timing subcommand which prints time from

  • STARTING: reserved->starting
  • RUNNING: starting->running
  • COMPLETE: running->complete
  • TOTAL: starting->complete

• Add three "run levels" for Flux jobs:

  1. run rc1 script on rank 0 to load modules, etc.
  2. run the user's initial program
  3. run rc3 script on rank 0 to unload modules, etc.

• Add module status reporting via keepalive messages. flux module list now reports live module status:

  • I = intializing
  • S = sleeping
  • X = exited
  • R = running
  • F = finalizing

• Conform to RFC 3 change that requires all JSON payloads to use objects as the outermost JSON type (no bare arrays for example).

• Add flux nodeset utility so scripts can manipulate nodesets.

• Make flux env output suitable for use in bash/zsh eval.

• Drop flux module --direct option. Module load/unload/list is now always direct between flux-module and broker(s). Drop the modctl module for distributed module control.

• When a module fails before entering its reactor loop, propagate the error back to flux module load so the user knows the load was not successful.

• Address memory leaks and adjust KVS usage to ameliorate increasing broker memory footprint and degrading job throughput when running many small jobs back to back. Active jobs are now stored under lwj-active to avoid creating excessive versions of the larger lwj directory as job state is accumulated.

• Bug fixes to live (TBON self-healing) module. The module is no longer loaded by default, pending additional work. flux up will always report all ranks up when live is not loaded.

• Send keepalives on the ring network and log idle peers on TBON and ring at LOG_CRIT level, where "idle" means no messages in >= 3 heartbeats.

• Compress large content-sqlite blobs with lzo to reduce disk utilization.

• KVS improvements:

  • kvs_put() follows intermediate symlinks
  • KVS operations bundled within one commit are applied in order
  • add kvs_copy() and kvs_move() utility functions.

• Configuration is loaded into broker attribute config namespace rather than KVS, and is no longer inherited from the enclosing instance.

• flux command driver usability improvements.

• Flux API improvements including dropping deprecated functions and fine tuning some function signatures (users should recompile).

• Build system allows --with-tcmalloc, --with-jemalloc, and tcmalloc heap profiling.

• Fine tuning of log levels and messages.

• Documentation improvements.

• Test suite improvements/fixes.

flux-core version 0.2.0 - 2016-02-16

• Avoid putting the Flux libpmi.so in the system ld.so path on systems where Flux is installed to the default system prefix, as this could interfere with MPI runtimes under other resource managers.

• Enable the SQLite backing store for the KVS by default, which addresses unchecked memory growth in the rank 0 broker.

• Stability and usability improvements to the flux-hwloc subcommand, and resource-hwloc comms module.

• Added the flux-version subcommand.

• Build system fixes.

• Test suite fixes.

flux-core version 0.1.0 - 2016-01-27

Initial release for build testing only.