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https://issues.apache.org/jira/browse/HIVE-13753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15282277#comment-15282277
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Vaibhav Gumashta commented on HIVE-13753:
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+1 pending tests. I would probably make the IMetaStoreClient member within the
SynchronizedMetaStoreClient a final too.
> 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
> Attachments: HIVE-13753.1.patch, HIVE-13753.2.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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