Bug Report

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2021-08-20T04:13:17.564Z] PASS: db_test.go:557: testDBSuite8.TestCancelAddPrimaryKey	5.966s

1. Minimal reproduce step (Required)

in ci https://ci.pingcap.net/blue/organizations/jenkins/tidb_ghpr_check_2/detail/tidb_ghpr_check_2/27698/pipeline

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

3. What did you see instead (Required)

4. What is your TiDB version? (Required)