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https://issues.apache.org/jira/browse/HIVE-18888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16390463#comment-16390463
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Sahil Takiar commented on HIVE-18888:
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+1 pending Peter's comment.
> Replace synchronizedMap with ConcurrentHashMap
> ----------------------------------------------
>
> Key: HIVE-18888
> URL: https://issues.apache.org/jira/browse/HIVE-18888
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 3.0.0, 2.3.3
> Reporter: Alexander Kolbasov
> Assignee: Alexander Kolbasov
> Priority: Major
> Attachments: HIVE-18888.01.patch
>
>
> There are a bunch of places that use Collections.synchronizedMap instead of
> ConcurrentHashMap which are better. We should search/replace the uses.
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