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https://issues.apache.org/jira/browse/HIVE-19392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16520811#comment-16520811
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Andrew Sherman commented on HIVE-19392:
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Hi [~dustinday] I think DataInputByteBuffer is not thread safe (and the parent
class java.io.DataInputStream is explicitly not thread safe) but it does not
seem to be used by multiple threads. Did you see a failure in hive/tez?
> unsynchronized index causes DataInputByteBuffer$Buffer.read hangs
> -----------------------------------------------------------------
>
> Key: HIVE-19392
> URL: https://issues.apache.org/jira/browse/HIVE-19392
> Project: Hive
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.0.0
> Reporter: John Doe
> Assignee: Andrew Sherman
> Priority: Minor
>
> In DataInputByteBuffer$Buffer class, the fields bidx and buffers, etc are
> unsynchronized when used in read() and reset() function. In certain
> circumstances, e.g., the reset() is invoked in a loop, the unsynchronized
> bidx and buffers can trigger a concurrency bug.
> This bug also shows in
> [Hadoop-15429|https://issues.apache.org/jira/browse/HADOOP-15429].
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