unstable test: TestAnalyzePartitionUnderV1Dynamic

[purelind]

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)

analyze_test.go:2980: 
        	Error Trace:	/home/jenkins/.tidb/tmp/cbd54d2e94f3b8ea3be1e953ff68550a/sandbox/processwrapper-sandbox/6965/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/analyzetest/analyzetest_test_/analyzetest_test.runfiles/__main__/executor/analyzetest/analyze_test.go:2980
        	Error:      	Not equal: 
        	            	expected: 3
        	            	actual  : 0
        	Test:       	TestAnalyzePartitionUnderV1Dynamic

link https://ci.pingcap.net/blue/organizations/jenkins/tidb-unit-test-bazel-with-cache/detail/tidb-unit-test-bazel-with-cache/6401/tests

4. What is your TiDB version? (Required)

[mjonss]

Looks like these logs are related (and same in #38882):

[2022/11/03 20:30:32.201 +08:00] [WARN] [plan_stats.go:106] ["SyncWaitStatsLoad timeout"]
[2022/11/03 20:30:32.202 +08:00] [WARN] [plan_stats.go:68] ["SyncWaitStatsLoad failed"]

[mjonss]

There are other tests that are unstable as well (tested with running 100 instances concurrently), like TestSavedAnalyzeOptions.

Looks like the SyncWaitStatsLoad failure is the cause, and I will check if it is OK to fail or not (if OK, then some kind of retry would be needed for stabilising the tests).