tiflow
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shardddl4_1 check diff failed at last
Which jobs are flaking?
DM-RESYNC_TXN_INTERRUPT
Which test(s) are flaking?
DM-IT
Jenkins logs or GitHub Actions link
https://ci2.pingcap.net/blue/organizations/jenkins/dm_ghpr_integration_test/detail/dm_ghpr_integration_test/8865/pipeline
Anything else we need to know
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Does this test exist for other branches as well?
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Has there been a high frequency of failure lately?
suspect optimistic sharding resync is not stable enough.