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Posted to dev@pig.apache.org by "Rohini Palaniswamy (JIRA)" <ji...@apache.org> on 2012/09/10 17:30:09 UTC

[jira] [Updated] (PIG-2912) Pig should clone JobConf while creating JobContextImpl and TaskAttemptContextImpl in Hadoop23

     [ https://issues.apache.org/jira/browse/PIG-2912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rohini Palaniswamy updated PIG-2912:
------------------------------------

    Attachment: PIG-2912-trunk.patch
                PIG-2912-branch10.patch
                PIG-2912-branch09.patch

The patch creates a clone if JobConf is passed. 

Testcase added in TestMultiQueryLocal ensures that if new settings are added in the backend by a store, they are not passed to other stores in a multi store script.
                
> Pig should clone JobConf while creating JobContextImpl and TaskAttemptContextImpl in Hadoop23
> ---------------------------------------------------------------------------------------------
>
>                 Key: PIG-2912
>                 URL: https://issues.apache.org/jira/browse/PIG-2912
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.9.3, 0.10.1
>            Reporter: Rohini Palaniswamy
>            Assignee: Rohini Palaniswamy
>             Fix For: 0.9.3, 0.11, 0.10.1
>
>         Attachments: PIG-2912-branch09.patch, PIG-2912-branch10.patch, PIG-2912-trunk.patch
>
>
> There is change in the semantics of
> JobContext::JobContext(Configuration, JobID). While in .20, the Config was
> cloned, in .23 the Config is adopted (if it's a JobConf). This causes the same
> Configuration instance to be written-to for different tables in the same job.
> It would affect multi store commands in pig on Hadoop 23/2.0. The
> cloning in HadoopShims was part of PIG-2578 but was reverted to other issues.

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