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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11948) Investigate TxnHandler and CompactionTxnHandler to see where we improve concurrency
Date Wed, 11 Nov 2015 16:06:11 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000573#comment-15000573
] 

Eugene Koifman commented on HIVE-11948:
---------------------------------------

test failures not related

> Investigate TxnHandler and CompactionTxnHandler to see where we improve concurrency
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-11948
>                 URL: https://issues.apache.org/jira/browse/HIVE-11948
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 0.14.0
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>         Attachments: HIVE-11948.3.patch, HIVE-11948.4.patch, HIVE-11948.5.patch, HIVE-11948.6.patch,
HIVE-11948.7.patch, HIVE-11948.patch
>
>
> at least some operations (or parts of operations) can run at READ_COMMITTED.
> CompactionTxnHandler.setRunAs()
> CompactionTxnHandler.findNextToCompact()
> if update stmt includes cq_state = '" + INITIATED_STATE + "'" in WHERE clause and logic
to look for "next" candidate
> CompactionTxnHandler.markCompacted()
> perhaps add cq_state=WORKING_STATE in Where clause (mostly as an extra consistency check)



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