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From "Kai Sasaki (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11749) To sometimes deadlock when run a query
Date Tue, 03 Nov 2015 09:16:27 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14986965#comment-14986965
] 

Kai Sasaki commented on HIVE-11749:
-----------------------------------

This problem is related to the {{TableDesc#equals}} method. equals method cannot be simply
{{synchronized}} because of the [consistency problem|http://stackoverflow.com/questions/1636399/correctly-synchronizing-equals-in-java].
How can we solve it?

> To sometimes deadlock when run a query
> --------------------------------------
>
>                 Key: HIVE-11749
>                 URL: https://issues.apache.org/jira/browse/HIVE-11749
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Ryu Kobayashi
>            Assignee: Kai Sasaki
>         Attachments: HIVE-11749.stack-tarace.txt
>
>
> But not always, to deadlock when it run the query. Environment are as follows:
> * Hadoop 2.6.0
> * Hive 0.13
> * JDK 1.7.0_79
> It will attach the stack trace.



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