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Improve advice regarding poor performance #4276

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merged 2 commits into from
Jun 18, 2019

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Ralith
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@Ralith Ralith commented Dec 8, 2018

This documents the assorted work-arounds that finally recovered my HS from total dysfunction, and which I've successfully applied to rescue others in similar straits on multiple occasions now.

@aaronraimist
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Fixes #3939

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You are missing a CHANGELOG file and a sign off (that’s why the test failed). See CONSTRIBUTING.rst

@jcaesar
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jcaesar commented Dec 9, 2018

From elsewhere I heard that using (a tuned) postgres also helps. Not sure if you want to add that.

@Ralith
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Ralith commented Dec 9, 2018

Good idea. Is an overloaded sqlite most strongly associated with adverse memory, CPU, or disk use?

@Half-Shot
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@Ralith The general wisdom I've heard these days is if your homeservers does any of the following:

  • Federates
  • Hosts a "large" number of users
  • You are in a lot of rooms

Then running postgres is a must, and hopefully you can tune postgres to not be too consuming if you are on a small box. Sqlite is really only good for spinning up quick demos or deving on, but not for communities or federating with the outside world. Personally I think we should make it a requirement of our packages and make it damn clear on the README that folks should run postgres if they are experiencing slowness.

@Ralith Ralith force-pushed the performance-advice branch 2 times, most recently from 2d4599c to afb8ad7 Compare December 9, 2018 18:00
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Ralith commented Dec 9, 2018

I merged the sections, added mention of postgres, and tweaked the wording a bit.

@richvdh richvdh changed the base branch from master to develop December 10, 2018 13:22
README.rst Outdated
excess of outgoing federation requests (see `discussion
<https://github.com/matrix-org/synapse/issues/3971>`_). If your server is
also issuing far more outgoing federation requests than can be accounted
for by your users' activity, this is a likely cause. The misbehavior can
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I'd really rather we fixed the bug than baked this into the README so that it becomes normality. I'm particularly concerned that, even if we do fix the bug, we'll end up forgetting to update the readme. #3971 already documents the workaround in the issue description - is there any need to repeat it here?

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I've been encountering a somewhat steady stream of people having this problem, and who knows how many go unseen. The situation right now is pretty dire and it is difficult for an affected server operator to find this information if it's not published somewhere central.

A better solution than mentioning the README would be to disable presence by default until it's no longer a performance disaster. Is that on the table?

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I'd argue that since the title of the section is "Help!! Synapse eats all my RAM!", it is already somewhat baked in to the README except without all the pertinent information. Not everyone knows to look for that issue.

I think it is important to get this section included in Synapse 1.0 until more performance improvements come in the future.

@ghost
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ghost commented Dec 23, 2018

Good idea. Is an overloaded sqlite most strongly associated with adverse memory, CPU, or disk use?

To maybe answer the question: SQLite can only write to one thing at once so it's just the database being so minimal that is the issue. On an SSD federating the 3 main rooms on matrix & riot my 24 cores only had 2 of them being used at around 60% and the database itself was just the limit. SSD was pretty idle as well.
It's great for what it's for, but big scale isn't really what it's for x.x

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aaronraimist commented Feb 12, 2019

Just adding a note here saying that this PR will need to be updated since the README has been reorganized a bit recently. I think this PR should be included in 1.0.

@Ralith
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Ralith commented Feb 13, 2019

I'd be happy to update it if there was any indication that it might be merged. It was in merge-ready state for some time following the previous iteration, after all.

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richvdh commented Feb 13, 2019

Ok if you could update it I'll merge it. I'm still unhappy that we're encouraging people to disable presence, but I guess we can remove it once we fix the bug.

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richvdh commented Feb 13, 2019

(thanks)

@anoadragon453
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@Ralith Do you plan to continue this PR?

Signed-off-by: Benjamin Saunders <ben.e.saunders@gmail.com>
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codecov bot commented Jun 9, 2019

Codecov Report

Merging #4276 into develop will increase coverage by 9.97%.
The diff coverage is n/a.

Impacted file tree graph

@@             Coverage Diff             @@
##           develop    #4276      +/-   ##
===========================================
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===========================================
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===========================================
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+ Misses       11803     9313    -2490     
+ Partials      1553        0    -1553
Impacted Files Coverage Δ
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synapse/replication/slave/storage/profile.py 0% <0%> (-100%) ⬇️
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Continue to review full report at Codecov.

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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codecov bot commented Jun 9, 2019

Codecov Report

Merging #4276 into develop will increase coverage by 9.97%.
The diff coverage is n/a.

Impacted file tree graph

@@             Coverage Diff             @@
##           develop    #4276      +/-   ##
===========================================
+ Coverage    62.53%   72.51%   +9.97%     
===========================================
  Files          326      333       +7     
  Lines        35649    33883    -1766     
  Branches      5848        0    -5848     
===========================================
+ Hits         22293    24569    +2276     
+ Misses       11803     9314    -2489     
+ Partials      1553        0    -1553
Impacted Files Coverage Δ
synapse/replication/slave/storage/directory.py 0% <0%> (-100%) ⬇️
synapse/replication/slave/storage/receipts.py 0% <0%> (-100%) ⬇️
synapse/replication/slave/storage/profile.py 0% <0%> (-100%) ⬇️
synapse/replication/slave/storage/transactions.py 0% <0%> (-100%) ⬇️
synapse/replication/slave/storage/registration.py 0% <0%> (-100%) ⬇️
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synapse/replication/slave/storage/events.py 0% <0%> (-88.71%) ⬇️
... and 334 more

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2decc92...b36de88. Read the comment docs.

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Ralith commented Jun 9, 2019

Rebased and slightly edited.

@richvdh richvdh requested a review from a team June 18, 2019 16:47
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looks great, thank you!

@richvdh richvdh merged commit 8fcd2ca into matrix-org:develop Jun 18, 2019
hawkowl added a commit that referenced this pull request Jul 5, 2019
Synapse 1.1.0 (2019-07-04)
==========================

As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4.
See the [upgrade notes](UPGRADE.rst#upgrading-to-v110) for more details.

This release also deprecates the use of environment variables to configure the
docker image. See the [docker README](https://github.com/matrix-org/synapse/blob/release-v1.1.0/docker/README.md#legacy-dynamic-configuration-file-support)
for more details.

No changes since 1.1.0rc2.

Synapse 1.1.0rc2 (2019-07-03)
=============================

Bugfixes
--------

- Fix regression in 1.1rc1 where OPTIONS requests to the media repo would fail. ([\#5593](#5593))
- Removed the `SYNAPSE_SMTP_*` docker container environment variables. Using these environment variables prevented the docker container from starting in Synapse v1.0, even though they didn't actually allow any functionality anyway. ([\#5596](#5596))
- Fix a number of "Starting txn from sentinel context" warnings. ([\#5605](#5605))

Internal Changes
----------------

- Update github templates. ([\#5552](#5552))

Synapse 1.1.0rc1 (2019-07-02)
=============================

As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4.
See the [upgrade notes](UPGRADE.rst#upgrading-to-v110) for more details.

Features
--------

- Added possibilty to disable local password authentication. Contributed by Daniel Hoffend. ([\#5092](#5092))
- Add monthly active users to phonehome stats. ([\#5252](#5252))
- Allow expired user to trigger renewal email sending manually. ([\#5363](#5363))
- Statistics on forward extremities per room are now exposed via Prometheus. ([\#5384](#5384), [\#5458](#5458), [\#5461](#5461))
- Add --no-daemonize option to run synapse in the foreground, per issue #4130. Contributed by Soham Gumaste. ([\#5412](#5412), [\#5587](#5587))
- Fully support SAML2 authentication. Contributed by [Alexander Trost](https://github.com/galexrt) - thank you! ([\#5422](#5422))
- Allow server admins to define implementations of extra rules for allowing or denying incoming events. ([\#5440](#5440), [\#5474](#5474), [\#5477](#5477))
- Add support for handling pagination APIs on client reader worker. ([\#5505](#5505), [\#5513](#5513), [\#5531](#5531))
- Improve help and cmdline option names for --generate-config options. ([\#5512](#5512))
- Allow configuration of the path used for ACME account keys. ([\#5516](#5516), [\#5521](#5521), [\#5522](#5522))
- Add --data-dir and --open-private-ports options. ([\#5524](#5524))
- Split public rooms directory auth config in two settings, in order to manage client auth independently from the federation part of it. Obsoletes the "restrict_public_rooms_to_local_users" configuration setting. If "restrict_public_rooms_to_local_users" is set in the config, Synapse will act as if both new options are enabled, i.e. require authentication through the client API and deny federation requests. ([\#5534](#5534))
- The minimum TLS version used for outgoing federation requests can now be set with `federation_client_minimum_tls_version`. ([\#5550](#5550))
- Optimise devices changed query to not pull unnecessary rows from the database, reducing database load. ([\#5559](#5559))
- Add new metrics for number of forward extremities being persisted and number of state groups involved in resolution. ([\#5476](#5476))

Bugfixes
--------

- Fix bug processing incoming events over federation if call to `/get_missing_events` fails. ([\#5042](#5042))
- Prevent more than one room upgrade happening simultaneously on the same room. ([\#5051](#5051))
- Fix a bug where running synapse_port_db would cause the account validity feature to fail because it didn't set the type of the email_sent column to boolean. ([\#5325](#5325))
- Warn about disabling email-based password resets when a reset occurs, and remove warning when someone attempts a phone-based reset. ([\#5387](#5387))
- Fix email notifications for unnamed rooms with multiple people. ([\#5388](#5388))
- Fix exceptions in federation reader worker caused by attempting to renew attestations, which should only happen on master worker. ([\#5389](#5389))
- Fix handling of failures fetching remote content to not log failures as exceptions. ([\#5390](#5390))
- Fix a bug where deactivated users could receive renewal emails if the account validity feature is on. ([\#5394](#5394))
- Fix missing invite state after exchanging 3PID invites over federaton. ([\#5464](#5464))
- Fix intermittent exceptions on Apple hardware. Also fix bug that caused database activity times to be under-reported in log lines. ([\#5498](#5498))
- Fix logging error when a tampered event is detected. ([\#5500](#5500))
- Fix bug where clients could tight loop calling `/sync` for a period. ([\#5507](#5507))
- Fix bug with `jinja2` preventing Synapse from starting. Users who had this problem should now simply need to run `pip install matrix-synapse`. ([\#5514](#5514))
- Fix a regression where homeservers on private IP addresses were incorrectly blacklisted. ([\#5523](#5523))
- Fixed m.login.jwt using unregistred user_id and added pyjwt>=1.6.4 as jwt conditional dependencies. Contributed by Pau Rodriguez-Estivill. ([\#5555](#5555), [\#5586](#5586))
- Fix a bug that would cause invited users to receive several emails for a single 3PID invite in case the inviter is rate limited. ([\#5576](#5576))

Updates to the Docker image
---------------------------
- Add ability to change Docker containers [timezone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) with the `TZ` variable. ([\#5383](#5383))
- Update docker image to use Python 3.7. ([\#5546](#5546))
- Deprecate the use of environment variables for configuration, and make the use of a static configuration the default. ([\#5561](#5561), [\#5562](#5562), [\#5566](#5566), [\#5567](#5567))
- Increase default log level for docker image to INFO. It can still be changed by editing the generated log.config file. ([\#5547](#5547))
- Send synapse logs to the docker logging system, by default. ([\#5565](#5565))
- Open the non-TLS port by default. ([\#5568](#5568))
- Fix failure to start under docker with SAML support enabled. ([\#5490](#5490))
- Use a sensible location for data files when generating a config file. ([\#5563](#5563))

Deprecations and Removals
-------------------------

- Python 2.7 is no longer a supported platform. Synapse now requires Python 3.5+ to run. ([\#5425](#5425))
- PostgreSQL 9.4 is no longer supported. Synapse requires Postgres 9.5+ or above for Postgres support. ([\#5448](#5448))
- Remove support for cpu_affinity setting. ([\#5525](#5525))

Improved Documentation
----------------------
- Improve README section on performance troubleshooting. ([\#4276](#4276))
- Add information about how to install and run `black` on the codebase to code_style.rst. ([\#5537](#5537))
- Improve install docs on choosing server_name. ([\#5558](#5558))

Internal Changes
----------------

- Add logging to 3pid invite signature verification. ([\#5015](#5015))
- Update example haproxy config to a more compatible setup. ([\#5313](#5313))
- Track deactivated accounts in the database. ([\#5378](#5378), [\#5465](#5465), [\#5493](#5493))
- Clean up code for sending federation EDUs. ([\#5381](#5381))
- Add a sponsor button to the repo. ([\#5382](#5382), [\#5386](#5386))
- Don't log non-200 responses from federation queries as exceptions. ([\#5383](#5383))
- Update Python syntax in contrib/ to Python 3. ([\#5446](#5446))
- Update federation_client dev script to support `.well-known` and work with python3. ([\#5447](#5447))
- SyTest has been moved to Buildkite. ([\#5459](#5459))
- Demo script now uses python3. ([\#5460](#5460))
- Synapse can now handle RestServlets that return coroutines. ([\#5475](#5475), [\#5585](#5585))
- The demo servers talk to each other again. ([\#5478](#5478))
- Add an EXPERIMENTAL config option to try and periodically clean up extremities by sending dummy events. ([\#5480](#5480))
- Synapse's codebase is now formatted by `black`. ([\#5482](#5482))
- Some cleanups and sanity-checking in the CPU and database metrics. ([\#5499](#5499))
- Improve email notification logging. ([\#5502](#5502))
- Fix "Unexpected entry in 'full_schemas'" log warning. ([\#5509](#5509))
- Improve logging when generating config files. ([\#5510](#5510))
- Refactor and clean up Config parser for maintainability. ([\#5511](#5511))
- Make the config clearer in that email.template_dir is relative to the Synapse's root directory, not the `synapse/` folder within it. ([\#5543](#5543))
- Update v1.0.0 release changelog to include more information about changes to password resets. ([\#5545](#5545))
- Remove non-functioning check_event_hash.py dev script. ([\#5548](#5548))
- Synapse will now only allow TLS v1.2 connections when serving federation, if it terminates TLS. As Synapse's allowed ciphers were only able to be used in TLSv1.2 before, this does not change behaviour. ([\#5550](#5550))
- Logging when running GC collection on generation 0 is now at the DEBUG level, not INFO. ([\#5557](#5557))
- Reduce the amount of stuff we send in the docker context. ([\#5564](#5564))
- Point the reverse links in the Purge History contrib scripts at the intended location. ([\#5570](#5570))
hawkowl added a commit that referenced this pull request Jul 29, 2019
commit c2ca163
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 22:48:20 2019 +1000

    don't block

commit 8d9a56e
Merge: b50d8a9 4a5fb54
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 21:35:42 2019 +1000

    Merge branch 'shhs' of ssh://github.com/matrix-org/synapse into shhs

commit 4a5fb54
Merge: 95a0386 992333b
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 20:59:41 2019 +1000

    Merge tag 'v1.2.1' into shhs

    Synapse 1.2.1 (2019-07-26)
    ==========================

    Security update
    ---------------

    This release includes *four* security fixes:

    - Prevent an attack where a federated server could send redactions for arbitrary events in v1 and v2 rooms. ([\#5767](#5767))
    - Prevent a denial-of-service attack where cycles of redaction events would make Synapse spin infinitely. Thanks to `@lrizika:matrix.org` for identifying and responsibly disclosing this issue. ([0f2ecb9](0f2ecb961))
    - Prevent an attack where users could be joined or parted from public rooms without their consent. Thanks to @dylanger for identifying and responsibly disclosing this issue. ([\#5744](#5744))
    - Fix a vulnerability where a federated server could spoof read-receipts from
      users on other servers. Thanks to @dylanger for identifying this issue too. ([\#5743](#5743))

    Additionally, the following fix was in Synapse **1.2.0**, but was not correctly
    identified during the original release:

    - It was possible for a room moderator to send a redaction for an `m.room.create` event, which would downgrade the room to version 1. Thanks to `/dev/ponies` for identifying and responsibly disclosing this issue! ([\#5701](#5701))

commit 95a0386
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 20:27:31 2019 +1000

    don't have a circleci config

commit b50d8a9
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 02:26:23 2019 +1000

    fix merging forward

commit 3edf6e9
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 02:07:05 2019 +1000

    fix this

commit f61cdc1
Merge: 43cf234 c0a1301
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 01:48:50 2019 +1000

    Merge tag 'v1.2.0' into shhs

    No changes since v1.2.0rc2.

commit 43cf234
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 26 01:48:20 2019 +1000

    dockerfile update

commit b7962f5
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Thu Jul 18 23:23:12 2019 +1000

    add a wait

commit 9bbf2d2
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:46:20 2019 +1000

    fix

commit 5daee2e
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:41:00 2019 +1000

    fix

commit 14c8b03
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:36:27 2019 +1000

    fix

commit 7fcd6c1
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:32:50 2019 +1000

    fix

commit c43c1ad
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:28:11 2019 +1000

    fix

commit a025abe
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:02:15 2019 +1000

    try now

commit c1777f5
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 04:00:34 2019 +1000

    try now

commit 646292c
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 17 03:58:34 2019 +1000

    see if we can do a build!

commit a175e60
Merge: 9b3a63e 0e54342
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 5 23:49:13 2019 +1000

    Merge remote-tracking branch 'origin/develop' into shhs

commit 9b3a63e
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 5 23:36:41 2019 +1000

    linting

commit 3d89feb
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 5 23:34:24 2019 +1000

    linting

commit 400bc06
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 5 22:44:22 2019 +1000

    linting

commit a1de642
Merge: f4343c7 54283f3
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Fri Jul 5 19:46:11 2019 +1000

    Merge tag 'v1.1.0' into shhs

    Synapse 1.1.0 (2019-07-04)
    ==========================

    As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4.
    See the [upgrade notes](UPGRADE.rst#upgrading-to-v110) for more details.

    This release also deprecates the use of environment variables to configure the
    docker image. See the [docker README](https://github.com/matrix-org/synapse/blob/release-v1.1.0/docker/README.md#legacy-dynamic-configuration-file-support)
    for more details.

    No changes since 1.1.0rc2.

    Synapse 1.1.0rc2 (2019-07-03)
    =============================

    Bugfixes
    --------

    - Fix regression in 1.1rc1 where OPTIONS requests to the media repo would fail. ([\#5593](#5593))
    - Removed the `SYNAPSE_SMTP_*` docker container environment variables. Using these environment variables prevented the docker container from starting in Synapse v1.0, even though they didn't actually allow any functionality anyway. ([\#5596](#5596))
    - Fix a number of "Starting txn from sentinel context" warnings. ([\#5605](#5605))

    Internal Changes
    ----------------

    - Update github templates. ([\#5552](#5552))

    Synapse 1.1.0rc1 (2019-07-02)
    =============================

    As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4.
    See the [upgrade notes](UPGRADE.rst#upgrading-to-v110) for more details.

    Features
    --------

    - Added possibilty to disable local password authentication. Contributed by Daniel Hoffend. ([\#5092](#5092))
    - Add monthly active users to phonehome stats. ([\#5252](#5252))
    - Allow expired user to trigger renewal email sending manually. ([\#5363](#5363))
    - Statistics on forward extremities per room are now exposed via Prometheus. ([\#5384](#5384), [\#5458](#5458), [\#5461](#5461))
    - Add --no-daemonize option to run synapse in the foreground, per issue #4130. Contributed by Soham Gumaste. ([\#5412](#5412), [\#5587](#5587))
    - Fully support SAML2 authentication. Contributed by [Alexander Trost](https://github.com/galexrt) - thank you! ([\#5422](#5422))
    - Allow server admins to define implementations of extra rules for allowing or denying incoming events. ([\#5440](#5440), [\#5474](#5474), [\#5477](#5477))
    - Add support for handling pagination APIs on client reader worker. ([\#5505](#5505), [\#5513](#5513), [\#5531](#5531))
    - Improve help and cmdline option names for --generate-config options. ([\#5512](#5512))
    - Allow configuration of the path used for ACME account keys. ([\#5516](#5516), [\#5521](#5521), [\#5522](#5522))
    - Add --data-dir and --open-private-ports options. ([\#5524](#5524))
    - Split public rooms directory auth config in two settings, in order to manage client auth independently from the federation part of it. Obsoletes the "restrict_public_rooms_to_local_users" configuration setting. If "restrict_public_rooms_to_local_users" is set in the config, Synapse will act as if both new options are enabled, i.e. require authentication through the client API and deny federation requests. ([\#5534](#5534))
    - The minimum TLS version used for outgoing federation requests can now be set with `federation_client_minimum_tls_version`. ([\#5550](#5550))
    - Optimise devices changed query to not pull unnecessary rows from the database, reducing database load. ([\#5559](#5559))
    - Add new metrics for number of forward extremities being persisted and number of state groups involved in resolution. ([\#5476](#5476))

    Bugfixes
    --------

    - Fix bug processing incoming events over federation if call to `/get_missing_events` fails. ([\#5042](#5042))
    - Prevent more than one room upgrade happening simultaneously on the same room. ([\#5051](#5051))
    - Fix a bug where running synapse_port_db would cause the account validity feature to fail because it didn't set the type of the email_sent column to boolean. ([\#5325](#5325))
    - Warn about disabling email-based password resets when a reset occurs, and remove warning when someone attempts a phone-based reset. ([\#5387](#5387))
    - Fix email notifications for unnamed rooms with multiple people. ([\#5388](#5388))
    - Fix exceptions in federation reader worker caused by attempting to renew attestations, which should only happen on master worker. ([\#5389](#5389))
    - Fix handling of failures fetching remote content to not log failures as exceptions. ([\#5390](#5390))
    - Fix a bug where deactivated users could receive renewal emails if the account validity feature is on. ([\#5394](#5394))
    - Fix missing invite state after exchanging 3PID invites over federaton. ([\#5464](#5464))
    - Fix intermittent exceptions on Apple hardware. Also fix bug that caused database activity times to be under-reported in log lines. ([\#5498](#5498))
    - Fix logging error when a tampered event is detected. ([\#5500](#5500))
    - Fix bug where clients could tight loop calling `/sync` for a period. ([\#5507](#5507))
    - Fix bug with `jinja2` preventing Synapse from starting. Users who had this problem should now simply need to run `pip install matrix-synapse`. ([\#5514](#5514))
    - Fix a regression where homeservers on private IP addresses were incorrectly blacklisted. ([\#5523](#5523))
    - Fixed m.login.jwt using unregistred user_id and added pyjwt>=1.6.4 as jwt conditional dependencies. Contributed by Pau Rodriguez-Estivill. ([\#5555](#5555), [\#5586](#5586))
    - Fix a bug that would cause invited users to receive several emails for a single 3PID invite in case the inviter is rate limited. ([\#5576](#5576))

    Updates to the Docker image
    ---------------------------
    - Add ability to change Docker containers [timezone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) with the `TZ` variable. ([\#5383](#5383))
    - Update docker image to use Python 3.7. ([\#5546](#5546))
    - Deprecate the use of environment variables for configuration, and make the use of a static configuration the default. ([\#5561](#5561), [\#5562](#5562), [\#5566](#5566), [\#5567](#5567))
    - Increase default log level for docker image to INFO. It can still be changed by editing the generated log.config file. ([\#5547](#5547))
    - Send synapse logs to the docker logging system, by default. ([\#5565](#5565))
    - Open the non-TLS port by default. ([\#5568](#5568))
    - Fix failure to start under docker with SAML support enabled. ([\#5490](#5490))
    - Use a sensible location for data files when generating a config file. ([\#5563](#5563))

    Deprecations and Removals
    -------------------------

    - Python 2.7 is no longer a supported platform. Synapse now requires Python 3.5+ to run. ([\#5425](#5425))
    - PostgreSQL 9.4 is no longer supported. Synapse requires Postgres 9.5+ or above for Postgres support. ([\#5448](#5448))
    - Remove support for cpu_affinity setting. ([\#5525](#5525))

    Improved Documentation
    ----------------------
    - Improve README section on performance troubleshooting. ([\#4276](#4276))
    - Add information about how to install and run `black` on the codebase to code_style.rst. ([\#5537](#5537))
    - Improve install docs on choosing server_name. ([\#5558](#5558))

    Internal Changes
    ----------------

    - Add logging to 3pid invite signature verification. ([\#5015](#5015))
    - Update example haproxy config to a more compatible setup. ([\#5313](#5313))
    - Track deactivated accounts in the database. ([\#5378](#5378), [\#5465](#5465), [\#5493](#5493))
    - Clean up code for sending federation EDUs. ([\#5381](#5381))
    - Add a sponsor button to the repo. ([\#5382](#5382), [\#5386](#5386))
    - Don't log non-200 responses from federation queries as exceptions. ([\#5383](#5383))
    - Update Python syntax in contrib/ to Python 3. ([\#5446](#5446))
    - Update federation_client dev script to support `.well-known` and work with python3. ([\#5447](#5447))
    - SyTest has been moved to Buildkite. ([\#5459](#5459))
    - Demo script now uses python3. ([\#5460](#5460))
    - Synapse can now handle RestServlets that return coroutines. ([\#5475](#5475), [\#5585](#5585))
    - The demo servers talk to each other again. ([\#5478](#5478))
    - Add an EXPERIMENTAL config option to try and periodically clean up extremities by sending dummy events. ([\#5480](#5480))
    - Synapse's codebase is now formatted by `black`. ([\#5482](#5482))
    - Some cleanups and sanity-checking in the CPU and database metrics. ([\#5499](#5499))
    - Improve email notification logging. ([\#5502](#5502))
    - Fix "Unexpected entry in 'full_schemas'" log warning. ([\#5509](#5509))
    - Improve logging when generating config files. ([\#5510](#5510))
    - Refactor and clean up Config parser for maintainability. ([\#5511](#5511))
    - Make the config clearer in that email.template_dir is relative to the Synapse's root directory, not the `synapse/` folder within it. ([\#5543](#5543))
    - Update v1.0.0 release changelog to include more information about changes to password resets. ([\#5545](#5545))
    - Remove non-functioning check_event_hash.py dev script. ([\#5548](#5548))
    - Synapse will now only allow TLS v1.2 connections when serving federation, if it terminates TLS. As Synapse's allowed ciphers were only able to be used in TLSv1.2 before, this does not change behaviour. ([\#5550](#5550))
    - Logging when running GC collection on generation 0 is now at the DEBUG level, not INFO. ([\#5557](#5557))
    - Reduce the amount of stuff we send in the docker context. ([\#5564](#5564))
    - Point the reverse links in the Purge History contrib scripts at the intended location. ([\#5570](#5570))

commit f4343c7
Merge: 4689408 463d5a8
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Wed Jul 3 22:39:30 2019 +1000

    Merge remote-tracking branch 'origin/develop' into shhs

commit 4689408
Merge: bed45ab b491468
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Tue Jul 2 18:31:29 2019 +1000

    Merge remote-tracking branch 'origin/develop' into shhs

commit bed45ab
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Tue Jul 2 18:18:09 2019 +1000

    release shhs on tags

commit 0993b05
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Mon Jul 1 23:13:21 2019 +1000

    improve error text when room is too large

commit e001115
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Tue Jun 18 21:24:56 2019 +1000

    fix

commit e60aab1
Merge: e7c1171 82d9d52
Author: Amber H. Brown <hawkowl@atleastfornow.net>
Date:   Tue Jun 18 21:20:13 2019 +1000

    Merge remote-tracking branch 'origin/develop' into shhs

commit e7c1171
Merge: 8fe26db c831748
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Tue Jun 4 20:41:59 2019 +1000

    Merge remote-tracking branch 'origin/master' into shhs

commit 8fe26db
Merge: c99c105 4a30e4a
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Tue May 21 14:30:47 2019 -0500

    Merge remote-tracking branch 'origin/develop' into HEAD

commit c99c105
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon May 20 17:01:50 2019 -0500

    SHHS - Room Join Complexity (#5072)

commit d142e51
Merge: d424ba9 24b93b9
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon May 20 15:43:08 2019 -0500

    Merge remote-tracking branch 'origin/develop' into shhs

commit d424ba9
Merge: a1b8767 f1e5b41
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Wed May 15 23:30:22 2019 -0500

    Merge remote-tracking branch 'origin/develop' into shhs

commit a1b8767
Merge: faee1e9 df2ebd7
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon May 13 15:01:58 2019 -0500

    Merge remote-tracking branch 'origin/develop' into shhs

commit faee1e9
Merge: 12875f9 d216a36
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Wed May 8 16:29:45 2019 -0500

    Merge remote-tracking branch 'origin/develop' into shhs

commit 12875f9
Merge: ed38141 c1799b0
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Wed May 1 10:55:14 2019 -0400

    Merge remote-tracking branch 'origin/develop' into shhs

commit ed38141
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:57:42 2019 +1000

    target better for the shhs release docker hub, pt 3

commit bd5f624
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:43:17 2019 +1000

    target better for the shhs release docker hub, pt 2

commit c0f57ca
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:36:35 2019 +1000

    target better for the shhs release docker hub

commit 1d5cf66
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:33:36 2019 +1000

    no media repo == no path checks

commit 25256f9
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:30:55 2019 +1000

    release shhs as a release

commit a32aa2c
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Mon Apr 29 20:28:40 2019 +1000

    patch up docker

commit cbc866a
Author: Amber Brown <hawkowl@atleastfornow.net>
Date:   Fri Apr 26 01:40:01 2019 +1000

    Remove Python 2 from the SHHS branch CI (#5099)
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6 participants