==================
WARNING: DATA RACE
Write at 0x00c0181eed78 by goroutine 420807:
  github.com/pingcap/tidb/ddl.(*ddl).addBatchDDLJobs2Table()
      ddl/ddl_worker.go:373 +0x5a8
  github.com/pingcap/tidb/ddl.(*ddl).addBatchDDLJobs()
      ddl/ddl_worker.go:221 +0x104
  github.com/pingcap/tidb/ddl.(*ddl).limitDDLJobs()
      ddl/ddl_worker.go:207 +0xb8
  github.com/pingcap/tidb/ddl.(*ddl).limitDDLJobs-fm()
      <autogenerated>:1 +0x39
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run.func1()
      util/wait_group_wrapper.go:154 +0x73
Previous read at 0x00c0181eed78 by goroutine 394470:
  reflect.Value.Int()
      GOROOT/src/reflect/value.go:1459 +0xf7
  encoding/json.intEncoder()
      GOROOT/src/encoding/json/encode.go:550 +0x45
  encoding/json.structEncoder.encode()
      GOROOT/src/encoding/json/encode.go:759 +0x2ba
  encoding/json.structEncoder.encode-fm()
      <autogenerated>:1 +0xdb
  encoding/json.ptrEncoder.encode()
      GOROOT/src/encoding/json/encode.go:943 +0x382
  encoding/json.ptrEncoder.encode-fm()
      <autogenerated>:1 +0x90
  encoding/json.(*encodeState).reflectValue()
      GOROOT/src/encoding/json/encode.go:358 +0x88
  encoding/json.(*encodeState).marshal()
      GOROOT/src/encoding/json/encode.go:330 +0x224
  encoding/json.Marshal()
      GOROOT/src/encoding/json/encode.go:161 +0xf9
  github.com/pingcap/tidb/parser/model.(*Job).Encode()
      parser/model/ddl.go:557 +0x2c8
  github.com/pingcap/tidb/parser/model.(*Job).Clone()
      parser/model/ddl.go:471 +0x4c
  github.com/pingcap/tidb/ddl.(*ddl).DoDDLJob()
      ddl/ddl.go:1051 +0x407
  github.com/pingcap/tidb/ddl.(*ddl).MultiSchemaChange()
      ddl/multi_schema_change.go:59 +0x9cd
  github.com/pingcap/tidb/ddl.(*ddl).AlterTable()
      ddl/ddl_api.go:3557 +0x2dc7
  github.com/pingcap/tidb/executor.(*DDLExec).executeAlterTable()
      executor/ddl.go:384 +0x294
  github.com/pingcap/tidb/executor.(*DDLExec).Next()
      executor/ddl.go:148 +0x37c
  github.com/pingcap/tidb/executor.Next()
      executor/executor.go:326 +0x326
  github.com/pingcap/tidb/executor.(*ExecStmt).next()
      executor/adapter.go:1194 +0x89
  github.com/pingcap/tidb/executor.(*ExecStmt).handleNoDelayExecutor()
      executor/adapter.go:939 +0x4f9
  github.com/pingcap/tidb/executor.(*ExecStmt).handleNoDelay()
      executor/adapter.go:764 +0x34a
  github.com/pingcap/tidb/executor.(*ExecStmt).Exec()
      executor/adapter.go:564 +0xf87
  github.com/pingcap/tidb/session.runStmt()
      session/session.go:2344 +0x62f
  github.com/pingcap/tidb/session.(*session).ExecuteStmt()
      session/session.go:2201 +0x1116
  github.com/pingcap/tidb/testkit.(*TestKit).ExecWithContext()
      testkit/testkit.go:325 +0x8ae
  github.com/pingcap/tidb/testkit.(*TestKit).MustExecWithContext()
      testkit/testkit.go:133 +0xb7
  github.com/pingcap/tidb/testkit.(*TestKit).MustExec()
      testkit/testkit.go:128 +0x138
  github.com/pingcap/tidb/ddl_test.TestMultiSchemaChangeAddColumnsParallel.func1()
      ddl/multi_schema_change_test.go:166 +0x47
  github.com/pingcap/tidb/ddl_test.putTheSameDDLJobTwice()
      ddl/multi_schema_change_test.go:1311 +0x79
  github.com/pingcap/failpoint.parseTerm()
      external/com_github_pingcap_failpoint/terms.go:149 +0x389
  github.com/pingcap/failpoint.parse()
      external/com_github_pingcap_failpoint/terms.go:126 +0xad
  github.com/pingcap/failpoint.newTerms()
      external/com_github_pingcap_failpoint/terms.go:98 +0x50
  github.com/pingcap/failpoint.(*Failpoint).Enable()
      external/com_github_pingcap_failpoint/failpoint.go:54 +0x44
  github.com/pingcap/failpoint.(*Failpoints).Enable()
      external/com_github_pingcap_failpoint/failpoints.go:105 +0x276
  github.com/pingcap/failpoint.Enable()
      external/com_github_pingcap_failpoint/failpoints.go:222 +0x50
  github.com/pingcap/tidb/ddl_test.putTheSameDDLJobTwice()
      ddl/multi_schema_change_test.go:1309 +0x2c
  github.com/pingcap/tidb/ddl_test.TestMultiSchemaChangeAddColumnsParallel()
      ddl/multi_schema_change_test.go:165 +0xd7
  github.com/pingcap/tidb/domain.(*Domain).LoadSysVarCacheLoop()
      domain/domain.go:1580 +0xa8
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3325 +0x6d3
  github.com/pingcap/tidb/domain.(*Domain).GetSessionCache()
      domain/sysvar_cache.go:62 +0x5c
  github.com/pingcap/tidb/session.(*session).loadCommonGlobalVariablesIfNeeded()
      session/session.go:3672 +0x104
  github.com/pingcap/tidb/session.(*session).ExecuteStmt()
      session/session.go:2103 +0x145
  github.com/pingcap/tidb/session.(*session).ExecuteInternal()
      session/session.go:1638 +0x31b
  github.com/pingcap/tidb/domain.(*Domain).LoadPrivilegeLoop()
      domain/domain.go:1524 +0x130
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3318 +0x684
  github.com/pingcap/tidb/testkit.bootstrap()
      testkit/mockstore.go:85 +0xac
  github.com/pingcap/tidb/testkit.CreateMockStoreAndDomain()
      testkit/mockstore.go:70 +0xe9
  github.com/pingcap/tidb/testkit.CreateMockStore()
      testkit/mockstore.go:62 +0x3b1
  github.com/pingcap/tidb/ddl_test.TestMultiSchemaChangeAddColumnsParallel()
      ddl/multi_schema_change_test.go:160 +0x3e
  testing.tRunner()
      GOROOT/src/testing/testing.go:1576 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1629 +0x47
Goroutine 420807 (running) created at:
  github.com/pingcap/tidb/util.(*WaitGroupWrapper).Run()
      util/wait_group_wrapper.go:152 +0xe4
  github.com/pingcap/tidb/ddl.(*ddl).Start()
      ddl/ddl.go:769 +0x354
  github.com/pingcap/tidb/domain.(*Domain).Init()
      domain/domain.go:1167 +0x14bc
  github.com/pingcap/tidb/session.(*domainMap).Get.func1()
      session/tidb.go:93 +0x676
  github.com/pingcap/tidb/util.RunWithRetry()
      util/misc.go:69 +0x93
  github.com/pingcap/tidb/session.(*domainMap).Get()
      session/tidb.go:79 +0x2d2
  github.com/pingcap/tidb/session.createSessionWithOpt()
      session/session.go:3529 +0x75
  github.com/pingcap/tidb/session.createSession()
      session/session.go:3525 +0x84
  github.com/pingcap/tidb/session.createSessions()
      session/session.go:3510 +0x6e
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3285 +0x3db
  github.com/pingcap/tidb/testkit.bootstrap()
      testkit/mockstore.go:85 +0xac
  github.com/pingcap/tidb/testkit.CreateMockStoreAndDomain()
      testkit/mockstore.go:70 +0xe9
  github.com/pingcap/tidb/testkit.CreateMockStore()
      testkit/mockstore.go:62 +0x3b1
  github.com/pingcap/tidb/ddl_test.TestMultiSchemaChangeAddColumnsParallel()
      ddl/multi_schema_change_test.go:160 +0x3e
  testing.tRunner()
      GOROOT/src/testing/testing.go:1576 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1629 +0x47
Goroutine 394470 (running) created at:
  testing.(*T).Run()
      GOROOT/src/testing/testing.go:1629 +0x805
  testing.runTests.func1()
      GOROOT/src/testing/testing.go:2036 +0x8d
  testing.tRunner()
      GOROOT/src/testing/testing.go:1576 +0x216
  testing.runTests()
      GOROOT/src/testing/testing.go:2034 +0x87c
  testing.(*M).Run()
      GOROOT/src/testing/testing.go:1906 +0xb44
  go.uber.org/goleak.VerifyTestMain()
      external/org_uber_go_goleak/testmain.go:53 +0x70
  github.com/pingcap/tidb/ddl_test.TestMain()
      ddl/main_test.go:74 +0x9bd
  main.main()
      bazel-out/k8-fastbuild/bin/ddl/ddl_test_/testmain.go:1368 +0x5e8
==================
==================