analyze is killed unexpected

[XuHuaiyu]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

If one analyze stmt is killed by the global memory controller, the following analyze stmts on the same connection will be killed immediately.
We can reproduce this problem by modifying the unit test: TestGlobalMemoryControlForAnalyze

diff --git a/executor/analyzetest/analyze_test.go b/executor/analyzetest/analyze_test.go
index 843200fea6..810a3014d1 100644
--- a/executor/analyzetest/analyze_test.go
+++ b/executor/analyzetest/analyze_test.go
@@ -3087,13 +3087,14 @@ func TestGlobalMemoryControlForAnalyze(t *testing.T) {
        sql := "analyze table t with 1.0 samplerate;" // Need about 100MB
        require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/util/memory/ReadMemStats", `return(536870912)`))
        require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/executor/mockAnalyzeMergeWorkerSlowConsume", `return(100)`))
-       defer func() {
-               require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/util/memory/ReadMemStats"))
-               require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/executor/mockAnalyzeMergeWorkerSlowConsume"))
-       }()
        _, err := tk0.Exec(sql)
        require.True(t, strings.Contains(err.Error(), "Out Of Memory Quota!"))
        runtime.GC()
+       require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/util/memory/ReadMemStats"))
+       require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/executor/mockAnalyzeMergeWorkerSlowConsume"))
+
+       _, err = tk0.Exec(sql)
+       require.NoError(t, err)
 }

2. What did you expect to see? (Required)

TestGlobalMemoryControlForAnalyze passed

3. What did you see instead (Required)

TestGlobalMemoryControlForAnalyze failed

4. What is your TiDB version? (Required)

master