DATA RACE in the expensivequery

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

[2022-07-06T05:06:18.111Z] ==================
[2022-07-06T05:06:18.111Z] WARNING: DATA RACE
[2022-07-06T05:06:18.111Z] Write at 0x00c000369788 by goroutine 58:
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/sessionctx/variable.(*SessionVars).InitStatementContext()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/sessionctx/variable/session.go:1173 +0x1e4
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/executor.ResetContextOfStmt()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/executor/executor.go:1788 +0x132
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/session.(*session).ExecuteStmt()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/session/session.go:1912 +0x384
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*TiDBContext).ExecuteStmt()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/driver_tidb.go:229 +0xd3
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*clientConn).handleStmt()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/conn.go:2022 +0x1d0
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*clientConn).handleQuery()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/conn.go:1876 +0x94f
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*clientConn).dispatch()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/conn.go:1371 +0x11f1
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*clientConn).Run()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/conn.go:1121 +0x2f3
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*Server).onConn()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/server.go:565 +0x1fe4
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*Server).startNetworkListener.func2()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/server.go:454 +0x47
[2022-07-06T05:06:18.111Z] 
[2022-07-06T05:06:18.111Z] Previous read at 0x00c000369788 by goroutine 149:
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/util/expensivequery.(*Handle).Run()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/util/expensivequery/expensivequery.go:70 +0x394
[2022-07-06T05:06:18.111Z]   main.createServer.func1()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/tidb-server/main.go:739 +0x39
[2022-07-06T05:06:18.111Z] 
[2022-07-06T05:06:18.111Z] Goroutine 58 (running) created at:
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*Server).startNetworkListener()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/server.go:454 +0x6f3
[2022-07-06T05:06:18.111Z]   github.com/pingcap/tidb/server.(*Server).Run.func1()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/server/server.go:369 +0x65
[2022-07-06T05:06:18.111Z] 
[2022-07-06T05:06:18.111Z] Goroutine 149 (running) created at:
[2022-07-06T05:06:18.111Z]   main.createServer()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/tidb-server/main.go:739 +0x544
[2022-07-06T05:06:18.111Z]   main.main()
[2022-07-06T05:06:18.111Z]       /home/jenkins/agent/workspace/tidb_ghpr_check_2/go/src/github.com/pingcap/tidb/tidb-server/main.go:205 +0x3e4
[2022-07-06T05:06:18.111Z] ==================

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

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

[hawkingrei]

https://ci.pingcap.net/blue/rest/organizations/jenkins/pipelines/tidb_ghpr_check_2/runs/85613/nodes/66/steps/171/log/?start=0

[tiancaiamao]

I can't reproduce after #35923
Guess it's fixed ... feel free to reopen it if I'm wrong