unit_test : data race

[AilinKid]

Bug Report

Please answer these questions before submitting your issue. Thanks!

[2020-06-10T05:34:50.397Z] WARNING: DATA RACE

[2020-06-10T05:34:50.397Z] Write at 0x00c000171158 by goroutine 255:

[2020-06-10T05:34:50.397Z]   github.com/pingcap/tidb/session_test.(*testSessionSerialSuite).TestStatementCountLimit()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/session_test.go:2456 +0x1c9

[2020-06-10T05:34:50.397Z]   github.com/pingcap/tidb/session_test.(*testSessionSerialSuite).TestStatementCountLimit()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/session_test.go:2454 +0x12d

[2020-06-10T05:34:50.397Z]   runtime.call32()

[2020-06-10T05:34:50.397Z]       /usr/local/go/src/runtime/asm_amd64.s:539 +0x3a

[2020-06-10T05:34:50.397Z]   reflect.Value.Call()

[2020-06-10T05:34:50.397Z]       /usr/local/go/src/reflect/value.go:321 +0xd3

[2020-06-10T05:34:50.397Z]   github.com/pingcap/check.(*suiteRunner).forkTest.func1()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/pkg/mod/github.com/pingcap/check@v0.0.0-20200212061837-5e12011dc712/check.go:850 +0x9aa

[2020-06-10T05:34:50.397Z]   github.com/pingcap/check.(*suiteRunner).forkCall.func1()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/pkg/mod/github.com/pingcap/check@v0.0.0-20200212061837-5e12011dc712/check.go:739 +0x113

[2020-06-10T05:34:50.397Z] 

[2020-06-10T05:34:50.397Z] Previous read at 0x00c000171158 by goroutine 568:

[2020-06-10T05:34:50.397Z]   github.com/pingcap/tidb/session.checkStmtLimit()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/tidb.go:247 +0xe7

[2020-06-10T05:34:50.397Z]   github.com/pingcap/tidb/session.finishStmt()

[2020-06-10T05:34:50.397Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/tidb.go:211 +0x133

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/session.runStmtWrap()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/session.go:1224 +0x568

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/session.(*session).ExecuteStmt()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/session.go:1164 +0xa6f

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/session.(*session).Execute()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/session/session.go:1077 +0x3ee

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/ddl/util.RemoveFromGCDeleteRange()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/ddl/util/util.go:121 +0x18f

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/ddl/util.CompleteDeleteRange()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/ddl/util/util.go:115 +0x227

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/ddl.(*delRange).doTask()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/ddl/delete_range.go:230 +0x611

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/ddl.(*delRange).doDelRangeWork()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/ddl/delete_range.go:184 +0x54c

[2020-06-10T05:34:50.398Z]   github.com/pingcap/tidb/ddl.(*delRange).startEmulator()

[2020-06-10T05:34:50.398Z]       /home/jenkins/agent/workspace/tidb_ghpr_unit_test/go/src/github.com/pingcap/tidb/ddl/delete_range.go:148 +0x1db

1. Minimal reproduce step (Required)

link: https://internal.pingcap.net/idc-jenkins/blue/organizations/jenkins/tidb_ghpr_unit_test/detail/tidb_ghpr_unit_test/39480/pipeline

2. What did you expect to see? (Required)

without datarace.

3. What did you see instead (Required)

datarace

4. Affected version (Required)

Not sure for other branch, but now is on master

5. Root Cause Analysis

[tiancaiamao]

Closed by @coocood #17964