hadoop-hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-790) race condition related to ScriptOperator + UnionOperator
Date Mon, 26 Jul 2010 05:54:52 GMT

     [ https://issues.apache.org/jira/browse/HIVE-790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carl Steinbach updated HIVE-790:
--------------------------------

    Fix Version/s: 0.4.0
      Component/s: Query Processor

> race condition related to ScriptOperator + UnionOperator
> --------------------------------------------------------
>
>                 Key: HIVE-790
>                 URL: https://issues.apache.org/jira/browse/HIVE-790
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Zheng Shao
>            Assignee: Ning Zhang
>             Fix For: 0.4.0
>
>         Attachments: Hive-790.patch, Hive-790_2.patch, Hive-790_3.patch, Hive-790_4.patch,
Hive_790_0.4.0.patch
>
>
> ScriptOperator uses a second thread to output the rows to the children operators. In
a corner case which contains a union, 2 threads might be outputting data into the same operator
hierarchy and caused race conditions.
> {code}
> CREATE TABLE tablea (cola STRING);
> SELECT *
> FROM (
>     SELECT TRANSFORM(cola)
>     USING 'cat'
>     AS cola
>     FROM tablea
>   UNION ALL
>     SELECT cola as cola
>     FROM tablea
> ) a;
> {code}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message