Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

ddl: fix panic when add index of generated column. #8620

Merged
merged 8 commits into from
Dec 11, 2018
Merged

ddl: fix panic when add index of generated column. #8620

merged 8 commits into from
Dec 11, 2018

Conversation

winkyao
Copy link
Contributor

@winkyao winkyao commented Dec 7, 2018 •
edited by c4pt0r
Loading

What problem does this PR solve?

exec below sqls:

CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL,
  `c` int(11) GENERATED ALWAYS AS (`a` + `b`) VIRTUAL DEFAULT NULL,
  `h` varchar(10) DEFAULT NULL,
  `m` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

insert into t values();
alter table t add index idx_c(c);

DDL add index worker will panic with:

2018/12/07 08:31:48.263 index.go:1050: [info] [ddl-reorg] start to reorg index of 1 region ranges, handle range:[1, 1).
2018/12/07 08:31:48.265 index.go:829: [error] [ddl-reorg] addIndexWorker assignment to entry in nil map goroutine 108175 [running]:
github.com/pingcap/tidb/util.GetStack(0xc00696d0f0, 0x12c0d60, 0x1643c10)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/util/misc.go:53 +0x74
github.com/pingcap/tidb/ddl.(*addIndexWorker).run.func1(0xc00e59a000)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:828 +0xda
panic(0x12c0d60, 0x1643c10)
	/usr/local/go/src/runtime/panic.go:513 +0x1b9
github.com/pingcap/tidb/util/rowDecoder.RowDecoder.DecodeAndEvalRowWithMap(0xc00dcac9f0, 0x0, 0xc00dcac6f0, 0xc00dcac930, 0x1, 0x1680260, 0xc00dbcacb0, 0xc00efa8df0, 0x1, 0x8, ...)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/util/rowDecoder/decoder.go:109 +0x620
github.com/pingcap/tidb/ddl.(*addIndexWorker).getIndexRecord(0xc00e59a000, 0x1, 0xc008ab7e80, 0x13, 0x13, 0xc00efa8df0, 0x1, 0x8, 0xb, 0xc008ab7e80, ...)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:530 +0x187
github.com/pingcap/tidb/ddl.(*addIndexWorker).fetchRowColVals.func1(0x1, 0xc008ab7e80, 0x13, 0x13, 0xc00efa8df0, 0x1, 0x8, 0x165e140, 0xc00da79570, 0x0)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:621 +0x1ca
github.com/pingcap/tidb/ddl.iterateSnapshotRows(0x16687c0, 0xc0004420f0, 0x1, 0x1681a60, 0xc00d3740d0, 0x59e1f2d47d00001, 0x1, 0x1, 0xc00676e001, 0xc00696da68, ...)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1235 +0x3f4
github.com/pingcap/tidb/ddl.(*addIndexWorker).fetchRowColVals(0xc00e59a000, 0x16819a0, 0xc0066350e0, 0x3f, 0x1, 0x1, 0x1, 0x0, 0x1659c80, 0xc00010e000, ...)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:605 +0x22c
github.com/pingcap/tidb/ddl.(*addIndexWorker).backfillIndexInTxn.func1(0x16819a0, 0xc0066350e0, 0xc0066350e0, 0x0)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:729 +0xfb
github.com/pingcap/tidb/kv.RunInNewTxn(0x16687c0, 0xc0004420f0, 0xc000442001, 0xc00696dce8, 0xc0066a8000, 0xc000483cf8)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/kv/txn.go:49 +0xdb
github.com/pingcap/tidb/ddl.(*addIndexWorker).backfillIndexInTxn(0xc00e59a000, 0x3f, 0x1, 0x1, 0x1524a01, 0x0, 0x203000, 0x0, 0x0, 0xc0001083a0, ...)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:724 +0x12e
github.com/pingcap/tidb/ddl.(*addIndexWorker).handleBackfillTask(0xc00e59a000, 0xc007e9e0a0, 0xc008ab7de0, 0x1)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:785 +0x14f
github.com/pingcap/tidb/ddl.(*addIndexWorker).run(0xc00e59a000, 0xc007e9e0a0)
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:851 +0x162
created by github.com/pingcap/tidb/ddl.(*worker).addPhysicalTableIndex
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1097 +0x20e


2018/12/07 08:31:48.267 index.go:981: [warning] [ddl-reorg] total added index for 0 rows, this task [1,1) add index for 0 failed [ddl:14]reorg worker panic., take time 0.001459317, update handle err <nil>
2018/12/07 08:31:48.267 index.go:854: [info] [ddl-reorg] worker[2] exit
2018/12/07 08:31:48.267 reorg.go:136: [info] [ddl] run reorg job done, handled 0 rows
2018/12/07 08:31:48.267 ddl_worker.go:515: [error] [ddl-worker 4, tp add index] run DDL job err [ddl:14]reorg worker panic.
github.com/pingcap/errors.AddStack
	/home/jenkins/workspace/build_tidb_master/go/pkg/mod/github.com/pingcap/errors@v0.11.0/errors.go:174
github.com/pingcap/errors.Trace
	/home/jenkins/workspace/build_tidb_master/go/pkg/mod/github.com/pingcap/errors@v0.11.0/juju_adaptor.go:12
github.com/pingcap/tidb/ddl.(*worker).waitTaskResults
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:956
github.com/pingcap/tidb/ddl.(*worker).handleReorgTasks
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:969
github.com/pingcap/tidb/ddl.(*worker).sendRangeTaskToWorkers
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1024
github.com/pingcap/tidb/ddl.(*worker).buildIndexForReorgInfo
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1051
github.com/pingcap/tidb/ddl.(*worker).addPhysicalTableIndex
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1100
github.com/pingcap/tidb/ddl.(*worker).addTableIndex
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:1124
github.com/pingcap/tidb/ddl.(*worker).onCreateIndex.func1
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/index.go:327
github.com/pingcap/tidb/ddl.(*worker).runReorgJob.func1
	/home/jenkins/workspace/build_tidb_master/go/src/github.com/pingcap/tidb/ddl/reorg.go:118
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1333

This change is Reviewable

@winkyao winkyao requested a review from crazycs520 December 7, 2018 12:18
crazycs520
crazycs520 reviewed Dec 7, 2018
View reviewed changes
Copy link
Contributor

@crazycs520 crazycs520 left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM

jackysp
jackysp previously approved these changes Dec 10, 2018
View reviewed changes
Copy link
Member

@jackysp jackysp left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM

@jackysp
Copy link
Member

jackysp commented Dec 10, 2018

Please resolve the conflicts.

@jackysp jackysp dismissed their stale review December 10, 2018 10:59

Need another LGTM, because it is a DDL PR.

@jackysp jackysp added the status/LGT2 Indicates that a PR has LGTM 2. label Dec 10, 2018
zimulala
zimulala previously approved these changes Dec 10, 2018
View reviewed changes
Copy link
Contributor

@zimulala zimulala left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM

@zimulala
Copy link
Contributor

/run-all-tests

@zimulala zimulala added status/LGT3 The PR has already had 3 LGTM. and removed status/LGT2 Indicates that a PR has LGTM 2. labels Dec 10, 2018
@winkyao
Copy link
Contributor Author

winkyao commented Dec 10, 2018

/run-all-tests

@winkyao
Copy link
Contributor Author

winkyao commented Dec 11, 2018

/run-all-tests

@winkyao winkyao merged commit d3b92e0 into pingcap:master Dec 11, 2018
@winkyao winkyao deleted the fix_generated_bug branch December 11, 2018 10:08
@winkyao winkyao mentioned this pull request Dec 11, 2018
Closed
@crazycs520 crazycs520 mentioned this pull request Dec 11, 2018
Merged
crazycs520 pushed a commit to crazycs520/tidb that referenced this pull request Dec 13, 2018
@winkyao @crazycs520
ddl: fix panic when add index of generated column. (pingcap#8620)
cf2d7e6
@crazycs520 crazycs520 mentioned this pull request Dec 13, 2018
Merged
iamzhoug37 pushed a commit to iamzhoug37/tidb that referenced this pull request Dec 13, 2018
@winkyao @iamzhoug37
ddl: fix panic when add index of generated column. (pingcap#8620)
90cb3d6
zimulala pushed a commit that referenced this pull request Dec 18, 2018
@crazycs520 @zimulala
ddl: fix panic when add index of generated column. (#8620) (#8676)
2106f61
@kennytm kennytm mentioned this pull request Apr 26, 2019
Merged
@you06 you06 added the sig/sql-infra SIG: SQL Infra label Mar 4, 2020
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@crazycs520 crazycs520 crazycs520 left review comments

@jackysp jackysp jackysp approved these changes

@zimulala zimulala zimulala left review comments

Assignees
No one assigned
Labels
sig/sql-infra SIG: SQL Infra status/LGT3 The PR has already had 3 LGTM. type/bugfix This PR fixes a bug.
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
6 participants
@winkyao @jackysp @zimulala @crazycs520 @zz-jason @you06