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https://issues.apache.org/jira/browse/FLINK-5664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15840429#comment-15840429
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Robert Metzger commented on FLINK-5664:
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IIRC this log entry has been there since rocksdb supports async checkpoints. I
don't think it's an issue.
However, since we now have this nice checkpoint monitoring interface, we could
remove it :)
> RocksDBBackend logging is noisy
> -------------------------------
>
> Key: FLINK-5664
> URL: https://issues.apache.org/jira/browse/FLINK-5664
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Reporter: Ufuk Celebi
>
> Running a job with rocks db and a low checkpointing interval the logs are
> flooded with
> {code}
> 2017-01-26 17:29:39,345 INFO
> org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend -
> Asynchronous RocksDB snapshot (File Stream Factory @
> file:/Users/uce/Desktop/1-2-testing/fs/83889867a493a1dc80f6c588c071b679,
> synchronous part) in thread Thread[Flat Map -> Sink: Unnamed (3/8),5,Flink
> Task Threads] took 0 ms.
> 2017-01-26 17:29:39,398 INFO
> org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend -
> Asynchronous RocksDB snapshot (File Stream Factory @
> file:/Users/uce/Desktop/1-2-testing/fs/83889867a493a1dc80f6c588c071b679,
> asynchronous part) in thread Thread[pool-88-thread-1,5,Flink Task Threads]
> took 53 ms.
> {code}
> Two log lines per stateful task per task manager per checkpoint. I can see
> that this is helpful for debugging, but maybe too much by default. Should we
> decrease the log level to debug?
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