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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-10483) ACID: insert overwrite with self join deadlocks on itself with DbTxnManager
Date Fri, 24 Apr 2015 23:49:39 GMT

     [ https://issues.apache.org/jira/browse/HIVE-10483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eugene Koifman updated HIVE-10483:
----------------------------------
    Summary: ACID: insert overwrite with self join deadlocks on itself with DbTxnManager 
(was: ACID: insert overwrite with self join deadlocks on itself)

> ACID: insert overwrite with self join deadlocks on itself with DbTxnManager
> ---------------------------------------------------------------------------
>
>                 Key: HIVE-10483
>                 URL: https://issues.apache.org/jira/browse/HIVE-10483
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning, Query Processor, Transactions
>    Affects Versions: 1.0.0
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>
> insert overwrite ta partition(part=xxxx) select xxx from tb join ta where part=xxxx
> It seems like the Shared conflicts with the Exclusive lock for Insert Overwrite even
though both are part of the same txn.
> More precisely insert overwrite requires X lock on partition and the read side needs
an S lock on the query.



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