[jira] [Commented] (PIG-5020) Give file location for loadcaster related warning and errors

["Daniel Dai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-5020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15472894#comment-15472894 ] 

Daniel Dai commented on PIG-5020:
---------------------------------

+1

> Give file location for loadcaster related warning and errors
> ------------------------------------------------------------
>
>                 Key: PIG-5020
>                 URL: https://issues.apache.org/jira/browse/PIG-5020
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Koji Noguchi
>            Assignee: Koji Noguchi
>            Priority: Minor
>         Attachments: pig-5020-v01.patch, pig-5020-v02.patch
>
>
> Loadcaster can be null due to bug like PIG-4974, or due to valid reasons when bytearray is returned by UDF or bytearray coming from union-ed relation with two different loadcasters.
> And when casting fails at runtime, it's sometimes not straightforward to find the corresponding typecast that's failing in your script.
> {noformat}
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 1075: Received a bytearray from the UDF or Union from two different Loaders. Cannot determine how to convert the bytearray to string.
>         at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNextString(POCast.java:1122)
> {noformat}
> Maybe we can add source location when possible.



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