jebter

If it happens again, we will reopen it

@cfzjywxk PTAL

Releted to issue: https://github.com/pingcap/tidb/issues/50959

``` [wait_group_wrapper.go:198] ["panic in the wait group"] [recover="runtime error: index out of range [0] with length 0"] [stack="github.com/pingcap/tidb/pkg/util.(*WaitGroupWrapper).RunWithRecover.func1.1\n\t/workspace/source/tidb/pkg/util/wait_group_wrapper.go:198\nruntime.gopanic\n\t/root/go/pkg/mod/golang.org/[email protected]/src/runtime/panic.go:791\nruntime.goPanicIndex\n\t/root/go/pkg/mod/golang.org/[email protected]/src/runtime/panic.go:115\ngithub.com/pingcap/tidb/pkg/util/codec.SerializeKeys.func1\n\t/workspace/source/tidb/pkg/util/codec/codec.go:431\ngithub.com/pingcap/tidb/pkg/util/codec.SerializeKeys\n\t/workspace/source/tidb/pkg/util/codec/codec.go:443\ngithub.com/pingcap/tidb/pkg/executor/join.(*rowTableBuilder).processOneChunk\n\t/workspace/source/tidb/pkg/executor/join/row_table_builder.go:126\ngithub.com/pingcap/tidb/pkg/executor/join.(*BuildWorkerV2).processOneChunk\n\t/workspace/source/tidb/pkg/executor/join/hash_join_v2.go:551\ngithub.com/pingcap/tidb/pkg/executor/join.(*BuildWorkerV2).splitPartitionAndAppendToRowTableImpl\n\t/workspace/source/tidb/pkg/executor/join/hash_join_v2.go:571\ngithub.com/pingcap/tidb/pkg/executor/join.(*BuildWorkerV2).splitPartitionAndAppendToRowTable\n\t/workspace/source/tidb/pkg/executor/join/hash_join_v2.go:533\ngithub.com/pingcap/tidb/pkg/executor/join.(*HashJoinV2Exec).splitAndAppendToRowTable.func1\n\t/workspace/source/tidb/pkg/executor/join/hash_join_v2.go:1446\ngithub.com/pingcap/tidb/pkg/util.(*WaitGroupWrapper).RunWithRecover.func1\n\t/workspace/source/tidb/pkg/util/wait_group_wrapper.go:202"]```

This is an enhancement，not a bug

/reopen

@Lily2025 Can this issue be closed?

Reference for the 8.5 branch: https://github.com/tikv/pd/issues/9962

Regression Analysis PR caused this regression: https://github.com/tikv/pd/pull/8032 Related to issue/feature: https://github.com/tikv/pd/issues/7897

/retest