unstable test testDBSuite2.TestAddUniqueIndexRollback

[tidb-ci-bot]

Bug Report

db_test.go:294:
    testAddIndexRollback(c, s.store, s.lease, idxName, addIdxSQL, errMsg, hasNullValsInKey)
db_test.go:372:
    c.Assert(err.Error(), Equals, errMsg, Commentf("err:%v", err))
... obtained string = "[kv:1062]Duplicate entry '2039' for key 'c3_index'"
... expected string = "[kv:1062]Duplicate entry '2038' for key 'c3_index'"
... err:[kv:1062]Duplicate entry '2039' for key 'c3_index'

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1. Minimal reproduce step (Required)

in ci https://ci.pingcap.net/blue/organizations/jenkins/tidb-unit-test-nightly/detail/tidb-unit-test-nightly/663/pipeline/

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master 57fa70a

[zhouqiang-cl]

happends again https://ci.pingcap.net/blue/organizations/jenkins/tidb-unit-test-nightly/detail/tidb-unit-test-nightly/1562/pipeline

[zimulala]

It feels similar to the reason for this issue #25634.

[ti-srebot]

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