Yun Tang created FLINK-17808:
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Summary: Rename checkpoint meta file to "_metadata" until it has
completed writing
Key: FLINK-17808
URL: https://issues.apache.org/jira/browse/FLINK-17808
Project: Flink
Issue Type: Improvement
Components: Runtime / Checkpointing
Affects Versions: 1.10.0
Reporter: Yun Tang
Fix For: 1.12.0
In practice, some developers or customers would use some strategy to find the
recent _metadata as the checkpoint to recover (e.g as many proposals in
FLINK-9043 suggest). However, there existed a "_meatadata" file does not mean
the checkpoint have been completed as the writing to create the "_meatadata"
file could break as some force quit (e.g. yarn application -kill).
We could create the checkpoint meta stream to write data to file named as
"_metadata.inprogress" and renamed it to "_metadata" once completed writing. By
doing so, we could ensure the "_metadata" is not broken.
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