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Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/09/18 20:13:04 UTC

[jira] [Commented] (HIVE-11149) Fix issue with sometimes HashMap in PerfLogger.java hangs

    [ https://issues.apache.org/jira/browse/HIVE-11149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876076#comment-14876076 ] 

Sergey Shelukhin commented on HIVE-11149:
-----------------------------------------

Hmm, looks like PerfLogger in SessionState is not thread safe. This will fix the issue on the callstack above, but couldn't two threads accessing the same session w/o "resetPerfLogger == true" still fail?

> Fix issue with sometimes HashMap in PerfLogger.java hangs 
> ----------------------------------------------------------
>
>                 Key: HIVE-11149
>                 URL: https://issues.apache.org/jira/browse/HIVE-11149
>             Project: Hive
>          Issue Type: Bug
>          Components: Logging
>    Affects Versions: 1.2.0
>            Reporter: WangMeng
>            Assignee: WangMeng
>         Attachments: HIVE-11149.01.patch, HIVE-11149.02.patch, HIVE-11149.03.patch
>
>
> In  Multi-thread environment,  sometimes the  HashMap in PerfLogger.java  will  casue massive Java Processes hang  and cost  large amounts of unnecessary CPU and Memory.



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