Backup hangs when processing a large number of tables #57666
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
similar with #53480
but when backup large amount of tables on one store. and if backup slow, some requests might wait for more than one hour, cause the connection reset.
2. What did you expect to see? (Required)
backup succeed
3. What did you see instead (Required)
backup stuck
4. What is your TiDB version? (Required)
master