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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4000) Hive client goes into infinite loop at 100% cpu
Date Fri, 15 Feb 2013 23:21:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579591#comment-13579591
] 

Owen O'Malley commented on HIVE-4000:
-------------------------------------

The kind of query that is creating the problem looks like:

{code}
from Tbl
insert ...
insert ...
{code}

The customer sees the problem with 50 or more inserts.
                
> Hive client goes into infinite loop at 100% cpu
> -----------------------------------------------
>
>                 Key: HIVE-4000
>                 URL: https://issues.apache.org/jira/browse/HIVE-4000
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.9.0
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.10.1
>
>         Attachments: HIVE-4000.D8493.1.patch
>
>
> The Hive client starts multiple threads to track the progress of the MapReduce jobs.
Unfortunately those threads access several static HashMaps that are not protected by locks.
When the HashMaps are modified, they sometimes cause race conditions that lead to the client
threads getting stuck in infinite loops.

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