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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1534) Code discovering UDFs in the script has a bug in a order by case
Date Thu, 05 Aug 2010 17:21:16 GMT

    [ https://issues.apache.org/jira/browse/PIG-1534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895742#action_12895742
] 

Daniel Dai commented on PIG-1534:
---------------------------------

+1. Verified that also solve skewed join case.

> Code discovering UDFs in the script has a bug in a order by case
> ----------------------------------------------------------------
>
>                 Key: PIG-1534
>                 URL: https://issues.apache.org/jira/browse/PIG-1534
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Pradeep Kamath
>            Assignee: Pradeep Kamath
>             Fix For: 0.8.0
>
>         Attachments: PIG-1534.patch
>
>
> Consider the following commandline:
> {noformat}
> java -cp /tmp/svncheckout/pig.jar:udf.jar:clusterdir org.apache.pig.Main -e "a = load
'studenttab' using udf.MyPigStorage(); b = order a by $0; dump b;"
> {noformat}
> Notice there is no "register udf.jar", instead udf.jar (which contains udf.MyPigStorage)
is in the classpath. Pig handles this case by shipping udf.jar to the backend. However the
above script with order by triggers the bug with the following error message:
>  ERROR 2997: Unable to recreate exception from backed error: java.lang.RuntimeException:
could not instantiate 'org.apache.pig.impl.builtin.RandomSampleLoader' with arguments '[udf.MyPigStorage,
100]'

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