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From "Teddy Choi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4516) Fix concurrency bug in serde/src/java/org/apache/hadoop/hive/serde2/io/TimestampWritable.java
Date Wed, 08 May 2013 02:09:19 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13651557#comment-13651557
] 

Teddy Choi commented on HIVE-4516:
----------------------------------

It seems like HIVE-4220.
                
> Fix concurrency bug in serde/src/java/org/apache/hadoop/hive/serde2/io/TimestampWritable.java
> ---------------------------------------------------------------------------------------------
>
>                 Key: HIVE-4516
>                 URL: https://issues.apache.org/jira/browse/HIVE-4516
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Jon Hartlaub
>         Attachments: TimestampWritable.java.patch
>
>
> A patch for concurrent use of TimestampWritable which occurs in a multithreaded scenario
(as found in AmpLab Shark).  A static SimpleDateFormat (not ThreadSafe) is used by TimestampWritable
in CTAS DDL statements where it manifests as data corruption when used in a concurrent environment.

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