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