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https://issues.apache.org/jira/browse/FLINK-4533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15506074#comment-15506074
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Chesnay Schepler commented on FLINK-4533:
-----------------------------------------

we intentionally don't protect the access within report(). This would mean that 
the deployment of a task could be delayed just because the reporter is 
currently within report(). This of course implies that the reporter can hit a 
ConcurrentModificationException, but this just means that we skip a single 
report.

I would close this issue.

> Unprotected access to meters in StatsDReporter#report()
> -------------------------------------------------------
>
>                 Key: FLINK-4533
>                 URL: https://issues.apache.org/jira/browse/FLINK-4533
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Minor
>
> Access to meters in AbstractReporter is protected by AbstractReporter.this.
> Access to meters in StatsDReporter#report() should do the same.



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