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https://issues.apache.org/jira/browse/HIVE-13014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-13014:
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Summary: RetryingMetaStoreClient is retrying acid related calls too
aggressievley (was: RetryingMetaStoreClient is retrying acid related calls too
aggresievley)
> RetryingMetaStoreClient is retrying acid related calls too aggressievley
> ------------------------------------------------------------------------
>
> Key: HIVE-13014
> URL: https://issues.apache.org/jira/browse/HIVE-13014
> Project: Hive
> Issue Type: Bug
> Components: Metastore, Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Critical
> Attachments: HIVE-13014.01.patch, HIVE-13014.02.patch,
> HIVE-13014.03.patch, HIVE-13014.04.patch, HIVE-13014.05.patch,
> HIVE-13014.06.patch, HIVE-13014.07.patch
>
>
> Not all metastore operations are idempotent. For example, commit_txn()
> consists of
> 1. request from client to server
> 2. server action
> 3. ack to client
> If network connection is broken after (or during) 2 but before 3 happens,
> RetryingMetastoreClient will retry the operation thus causing an attempt to
> commit the same txn twice (sometimes in concurrently)
> The 2nd attempt is guaranteed to fail and thus return an error to the caller
> (which doesn't know the operation is being retried), while the first attempt
> has actually succeeded. Thus the caller thinks commit failed and will likely
> attempt to redo the transactions - not what we want in most cases.
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