DATA RACE in the worker.mergeWarningsIntoJob

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

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

3. What did you see instead (Required)

 WARNING: DATA RACE
Write at 0x00c00e237cc0 by goroutine 189474:
  github.com/pingcap/tidb/parser/model.(*Job).SetWarnings()
      parser/model/ddl.go:598 +0x231
  github.com/pingcap/tidb/ddl.(*worker).mergeWarningsIntoJob()
      ddl/reorg.go:283 +0x137
  github.com/pingcap/tidb/ddl.(*worker).runReorgJob()
      ddl/reorg.go:264 +0xd10
  github.com/pingcap/tidb/ddl.runReorgJobAndHandleErr()
      ddl/index.go:925 +0x687
  github.com/pingcap/tidb/ddl.doReorgWorkForCreateIndex()
      ddl/index.go:859 +0xbe8
  github.com/pingcap/tidb/ddl.(*worker).onCreateIndex()
      ddl/index.go:670 +0x11ad
  github.com/pingcap/tidb/ddl.(*worker).runDDLJob()
      ddl/ddl_worker.go:1011 +0x7f5
  github.com/pingcap/tidb/ddl.(*worker).HandleDDLJobTable()
      ddl/ddl_worker.go:763 +0x67c
  github.com/pingcap/tidb/ddl.(*ddl).delivery2worker.func1()
      ddl/job_table.go:271 +0xb45
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run.func1()
      util/wait_group_wrapper.go:154 +0x73
Previous read at 0x00c00e237cc0 by goroutine 189486:
  github.com/pingcap/tidb/parser/model.(*Job).String()
      parser/model/ddl.go:672 +0x4b1
  github.com/pingcap/tidb/ddl.(*worker).addPhysicalTableIndex()
      ddl/index.go:1721 +0x356
  github.com/pingcap/tidb/ddl.(*worker).addTableIndex()
      ddl/index.go:1735 +0x411
  github.com/pingcap/tidb/ddl.runReorgJobAndHandleErr.func1()
      ddl/index.go:930 +0x131
  github.com/pingcap/tidb/ddl.(*worker).runReorgJob.func1()
      ddl/reorg.go:211 +0x92
Goroutine 189474 (running) created at:
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run()
      util/wait_group_wrapper.go:152 +0xe4
  github.com/pingcap/tidb/ddl.(*ddl).delivery2worker()
      ddl/job_table.go:230 +0x1b7
  github.com/pingcap/tidb/ddl.(*ddl).loadDDLJobAndRun()
      ddl/job_table.go:223 +0x57c
  github.com/pingcap/tidb/ddl.(*ddl).startDispatchLoop()
      ddl/job_table.go:196 +0xad1
  github.com/pingcap/tidb/ddl.(*ddl).startDispatchLoop-fm()
      <autogenerated>:1 +0x39
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run.func1()
      util/wait_group_wrapper.go:154 +0x73
Goroutine 189486 (running) created at:
  github.com/pingcap/tidb/ddl.(*worker).runReorgJob()
      ddl/reorg.go:209 +0x579
  github.com/pingcap/tidb/ddl.runReorgJobAndHandleErr()
      ddl/index.go:925 +0x687
  github.com/pingcap/tidb/ddl.doReorgWorkForCreateIndex()
      ddl/index.go:859 +0xbe8
  github.com/pingcap/tidb/ddl.(*worker).onCreateIndex()
      ddl/index.go:670 +0x11ad
  github.com/pingcap/tidb/ddl.(*worker).runDDLJob()
      ddl/ddl_worker.go:1011 +0x7f5
  github.com/pingcap/tidb/ddl.(*worker).HandleDDLJobTable()
      ddl/ddl_worker.go:763 +0x67c
  github.com/pingcap/tidb/ddl.(*ddl).delivery2worker.func1()
      ddl/job_table.go:271 +0xb45
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run.func1()
      util/wait_group_wrapper.go:154 +0x73 

4. What is your TiDB version? (Required)

[hawkingrei]

the same as #40751