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From "Chen Chun (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-2757) ambari-log4j shouldn't affect the normal work of JobTracker or Hive
Date Tue, 30 Jul 2013 07:59:49 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13723534#comment-13723534
] 

Chen Chun commented on AMBARI-2757:
-----------------------------------

I notice that the initialization of DB connection is already moved to the persist method in
AMBARI-2427. So there is no chance that it will affect the start of jobTracker when job history
db is unavailable.
But if Ambari's job history db is down while jobTracker is running, the LoggingEvent queue
may take lots of memory. So I limit the LoggingEvent queue's capacity and change events.add
to events.offer to avoid throwing an exception when LoggingEvent queue is full. See TestJobHistoryAppender.
                
> ambari-log4j shouldn't affect the normal work of JobTracker or Hive
> -------------------------------------------------------------------
>
>                 Key: AMBARI-2757
>                 URL: https://issues.apache.org/jira/browse/AMBARI-2757
>             Project: Ambari
>          Issue Type: Improvement
>    Affects Versions: 1.3.1, 1.2.6
>            Reporter: Billie Rinaldi
>         Attachments: AMBARI-2757.patch
>
>
> If Ambari's job history db is unavailable, it shouldn't affect the running of the JobTracker.

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