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From "Vaibhav Gumashta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13753) Make metastore client thread safe in DbTxnManager
Date Mon, 16 May 2016 17:32:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284885#comment-15284885
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Vaibhav Gumashta commented on HIVE-13753:
-----------------------------------------

[~wzheng] Looks like there was a build failure.

> Make metastore client thread safe in DbTxnManager
> -------------------------------------------------
>
>                 Key: HIVE-13753
>                 URL: https://issues.apache.org/jira/browse/HIVE-13753
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 1.3.0, 2.1.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>             Fix For: 1.3.0, 2.1.0
>
>         Attachments: HIVE-13753.1.patch, HIVE-13753.2.patch, HIVE-13753.3.patch
>
>
> The fact that multiple threads sharing the same metastore client which is used for RPC
to Thrift is not thread safe.
> Race condition can happen when one sees "out of sequence response" error message from
Thrift server. That means the response from the Thrift server is for a different request (by
a different thread).
> Solution will be to synchronize methods from the client side.



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