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https://issues.apache.org/jira/browse/FLINK-3103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056541#comment-15056541
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Stephan Ewen commented on FLINK-3103:
-------------------------------------
The class is not really designed for concurrent use.
But I see your point, it is actually inconsistent with the fact that the
{{close()}} methods use the lock.
I would actually suggest to not use a lock in the {{close()}} methods either.
In a single threaded use, there is really no need for these locks.
> Accessing closed in FsStateBackend#FsCheckpointStateOutputStream#flush()
> should be synchronized
> -----------------------------------------------------------------------------------------------
>
> Key: FLINK-3103
> URL: https://issues.apache.org/jira/browse/FLINK-3103
> Project: Flink
> Issue Type: Bug
> Reporter: Ted Yu
>
> Here is related code:
> {code}
> public void flush() throws IOException {
> if (!closed) {
> {code}
> Lock "FsCheckpointStateOutputStream.this" should be held.
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