Zakelly Lan created FLINK-38434:
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Summary: Avoid delete ForSt's directory when there happened to be
an existing one
Key: FLINK-38434
URL: https://issues.apache.org/jira/browse/FLINK-38434
Project: Flink
Issue Type: Bug
Affects Versions: 2.1.0, 2.0.0
Reporter: Zakelly Lan
Assignee: Han Yin
Currently, ForSt State backend will create the working directory, if there
exists one with same name the directory will be cleared. The name contains
jobid, vertexid, task_index, parallelism and attempt. In JM failover scenario,
this would be a collision as the attempt number restart from 0, resulting in
checkpoint broken.
We should remove the clear existing directory logic.
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