flaky test TestInstancePlanCacheConcurrencySysbench #65221
Description
Bug Report
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The test branch is the master branch, and Go 1.25 is used. （https://do.pingcap.net/jenkins/job/pingcap/job/tidb/job/ghpr_unit_test/46866/）
testkit.go:171: Error Trace: pkg/testkit/testkit.go:171 pkg/testkit/testkit.go:156 pkg/planner/core/casetest/instanceplancache/concurrency_test.go:85 src/runtime/asm_amd64.s:1693 Error: Received unexpected error: [executor:1213]Deadlock found when trying to get lock; try restarting transaction github.com/pingcap/errors.Trace external/com_github_pingcap_errors/juju_adaptor.go:15 github.com/pingcap/tidb/pkg/testkit.(*TestKit).ExecWithContext pkg/testkit/testkit.go:439 github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustExecWithContext pkg/testkit/testkit.go:168 github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustExec pkg/testkit/testkit.go:156 pkg/planner/core/casetest/instanceplancache/instanceplancache_test.(*worker).run pkg/planner/core/casetest/instanceplancache/concurrency_test.go:85 runtime.goexit src/runtime/asm_amd64.s:1693 Test: TestInstancePlanCacheConcurrencySysbench Messages: sql:update normal.sbtest set c='991' where id=88, [], error stack [executor:1213]Deadlock found when trying to get lock; try restarting transaction github.com/pingcap/errors.Trace external/com_github_pingcap_errors/juju_adaptor.go:15 github.com/pingcap/tidb/pkg/testkit.(*TestKit).ExecWithContext pkg/testkit/testkit.go:439 github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustExecWithContext pkg/testkit/testkit.go:168 github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustExec pkg/testkit/testkit.go:156 pkg/planner/core/casetest/instanceplancache/instanceplancache_test.(*worker).run pkg/planner/core/casetest/instanceplancache/concurrency_test.go:85 runtime.goexit src/runtime/asm_amd64.s:1693