test "full_mode" failed to auto remove dump files

[lance6716]

Which jobs are flaking?

dm-IT

Which test(s) are flaking?

full_mode

Jenkins logs or GitHub Actions link

https://ci2.pingcap.net/blue/organizations/jenkins/dm_ghpr_integration_test/detail/dm_ghpr_integration_test/351/pipeline/

https://ci2.pingcap.net/blue/organizations/jenkins/dm_ghpr_integration_test/detail/dm_ghpr_integration_test/480/pipeline/

Anything else we need to know

• Does this test exist for other branches as well?

• Has there been a high frequency of failure lately?

[lance6716]

[2021-11-11T01:28:26.574Z] [2021/11/11 09:28:24.588 +08:00] [ERROR] [baseconn.go:184] ["execute statement failed"] [task=test] [unit=load] [query="CREATE DATABASE `full_mode` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_bin */ /*!80016 DEFAULT ENCRYPTION='N' */;"] [argument="[]"] [error="Error 8028: Information schema is changed during the execution of the statement(for example, table definition may be updated by other DDL ran in parallel). If you see this error often, try increasing `tidb_max_delta_schema_count`. [try again later]"]

this is the log file of https://ci2.pingcap.net/blue/organizations/jenkins/dm_ghpr_integration_test/detail/dm_ghpr_integration_test/480/pipeline/

➡️ 480.log

[lichunzhu]

happens again in: https://ci2.pingcap.net/blue/organizations/jenkins/dm_ghpr_integration_test/detail/dm_ghpr_integration_test/499/pipeline