You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hive.apache.org by "Ning Zhang (JIRA)" <ji...@apache.org> on 2009/09/01 22:27:33 UTC
[jira] Updated: (HIVE-790) race condition related to ScriptOperator
+ UnionOperator
[ https://issues.apache.org/jira/browse/HIVE-790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ning Zhang updated HIVE-790:
----------------------------
Attachment: Hive_790_0.4.0.patch
patch Hive_790_0.4.0.patch is the patch for branch 0.4.0.
> race condition related to ScriptOperator + UnionOperator
> --------------------------------------------------------
>
> Key: HIVE-790
> URL: https://issues.apache.org/jira/browse/HIVE-790
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Zheng Shao
> Assignee: Ning Zhang
> 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.