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https://issues.apache.org/jira/browse/FLINK-18038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17120765#comment-17120765
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Congxian Qiu(klion26) commented on FLINK-18038:
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I think logging the final used configuration is useful for the user.
> StateBackendLoader logs application-defined state before it is fully
> configured
> -------------------------------------------------------------------------------
>
> Key: FLINK-18038
> URL: https://issues.apache.org/jira/browse/FLINK-18038
> Project: Flink
> Issue Type: Bug
> Components: Runtime / State Backends
> Affects Versions: 1.9.1
> Reporter: Steve Bairos
> Priority: Trivial
>
> In the
> [StateBackendLoader|[https://github.com/apache/flink/blob/bb46756b84940a6134910e74406bfaff4f2f37e9/flink-runtime/src/main/java/org/apache/flink/runtime/state/StateBackendLoader.java#L201]],
> there's this log line:
> {code:java}
> logger.info("Using application-defined state backend: {}", fromApplication);
> {code}
> It seems like this is inaccurate though because immediately after logging
> this, if fromApplication is a ConfigurableStateBackend, we call the
> .configure() function and it is replaced by a newly configured StateBackend.
> To me, it seems like it would be better if we logged the state backend after
> it was fully configured. In the current setup, we get confusing logs like
> this:
> {code:java}
> 2020-05-29 21:39:44,387 INFO
> org.apache.flink.streaming.runtime.tasks.StreamTask - Using
> application-defined state backend:
> RocksDBStateBackend{checkpointStreamBackend=File State Backend (checkpoints:
> 's3://pinterest-montreal/checkpoints/xenon-dev-001-20191210/Xenon/BasicJavaStream',
> savepoints: 'null', asynchronous: UNDEFINED, fileStateThreshold: -1),
> localRocksDbDirectories=null, enableIncrementalCheckpointing=UNDEFINED,
> numberOfTransferingThreads=-1}2020-05-29 21:39:44,387 INFO
> org.apache.flink.streaming.runtime.tasks.StreamTask - Configuring
> application-defined state backend with job/cluster config{code}
> Which makes it ambiguous whether or not settings in our flink-conf.yaml like
> "state.backend.incremental: true" are being applied properly or not.
>
> I can make a diff for the change if there aren't any objections
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