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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11934) Transaction lock retry logic results in infinite loop
Date Wed, 30 Sep 2015 20:22:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938792#comment-14938792
] 

Ashutosh Chauhan commented on HIVE-11934:
-----------------------------------------

* It will be good to add message in RetryException()
* I see isRetryable() only handle a specific case of MS SQL Server. That should be expanded.
In particular, in original problem description by [~appcrawler] problem is faced with Oracle.
Shall we add detection of error code ORA-8177 ?

> Transaction lock retry logic results in infinite loop
> -----------------------------------------------------
>
>                 Key: HIVE-11934
>                 URL: https://issues.apache.org/jira/browse/HIVE-11934
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2, Transactions
>    Affects Versions: 1.2.1
>            Reporter: Steve Howard
>            Assignee: Eugene Koifman
>            Priority: Minor
>         Attachments: HIVE-11934.patch
>
>
> We reset the deadlock count to 0 every time the lock() method is called in org.apache.hadoop.hive.metastore.txn.TxnHandler,
so the ten count is never reached in checkRetryable().
> We should let checkRetryable handle the deadlock count.
>   public LockResponse lock(LockRequest rqst)
>     throws NoSuchTxnException, TxnAbortedException, MetaException
>   {
> >>>    this.deadlockCnt = 0; <<<
>     try
>     {
>       Connection dbConn = null;
>       try
>       {



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