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https://issues.apache.org/jira/browse/FLINK-8661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441942#comment-16441942
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ASF GitHub Bot commented on FLINK-8661:
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Github user bowenli86 commented on the issue:
https://github.com/apache/flink/pull/5864
does using Collections.EMPTY_MAP/EMPTY_SET lead to some warnings logging?
> Replace Collections.EMPTY_MAP with Collections.emptyMap()
> ---------------------------------------------------------
>
> Key: FLINK-8661
> URL: https://issues.apache.org/jira/browse/FLINK-8661
> Project: Flink
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: mingleizhang
> Priority: Minor
>
> The use of Collections.EMPTY_SET and Collections.EMPTY_MAP often causes
> unchecked assignment. It should be replaced with Collections.emptySet() and
> Collections.emptyMap() .
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