unstable test testPlanSerialSuite.TestPrepareCacheDeferredFunction #25690
Description
Bug Report
[2021-06-22T17:49:12.217Z] FAIL: prepare_test.go:170: testPlanSerialSuite.TestPrepareCacheDeferredFunction
[2021-06-22T17:49:12.217Z]
[2021-06-22T17:49:12.217Z] prepare_test.go:225:
[2021-06-22T17:49:12.217Z] ...
[2021-06-22T17:49:12.217Z] /home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/util/testleak/leaktest.go:168:
[2021-06-22T17:49:12.217Z] c.Errorf("Test %s check-count %d appears to have leaked: %v", c.TestName(), cnt, g)
[2021-06-22T17:49:12.217Z] ... Error: Test testPlanSerialSuite.TestPrepareCacheDeferredFunction check-count 50 appears to have leaked: github.com/pingcap/tidb/ddl.(*worker).start(0xc2eee055e0, 0xc2eec93980)
[2021-06-22T17:49:12.217Z] /home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/ddl/ddl_worker.go:157 +0x315
[2021-06-22T17:49:12.217Z] created by github.com/pingcap/tidb/ddl.(*ddl).Start
[2021-06-22T17:49:12.217Z] /home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/ddl/ddl.go:364 +0x6a5
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master 6d032c5