Nico Kruber created FLINK-7261:
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Summary: avoid unnecessary exceptions in the logs in non-HA cases
Key: FLINK-7261
URL: https://issues.apache.org/jira/browse/FLINK-7261
Project: Flink
Issue Type: Sub-task
Components: Distributed Coordination, Network
Affects Versions: 1.4.0
Reporter: Nico Kruber
Assignee: Nico Kruber
{{PermanentBlobCache#getHAFileInternal}} first tries to download files from the
HA store but if it does not exist, it will log an exception from the attempt to
move the {{incomingFile}} to its destination which is misleading to the user.
We should extend {{BlobView#get}} to return whether a file was actually copied
or not, e.g. in the {{VoidBlobStore}} to keep the abstraction of the BLOB
stores but to not report errors in expected cases (recall that
{{FileSystemBlobStore#get}} will already throw an exception if anything failed
in there and if successful but the succeeding move fails the exception from the
move should still be prevailed).
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