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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MRUNIT-158) withOutput doesn't generate useful information with MapWritable on error
Date Wed, 21 Nov 2012 17:55:58 GMT

    [ https://issues.apache.org/jira/browse/MRUNIT-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13502157#comment-13502157
] 

Patrick Hunt commented on MRUNIT-158:
-------------------------------------

I will create/reopen the hadoop jira.

Seems like the previous comment about printing a warning message is a good one - anyone can
create a writable and if there is an issue with it not being compatible with mrunit having
the user get notified would be useful. Providing insight into how to get around the issue
(ie using run()) would be even more useful.
                
> withOutput doesn't generate useful information with MapWritable on error
> ------------------------------------------------------------------------
>
>                 Key: MRUNIT-158
>                 URL: https://issues.apache.org/jira/browse/MRUNIT-158
>             Project: MRUnit
>          Issue Type: Improvement
>    Affects Versions: 0.9.0
>            Reporter: Patrick Hunt
>            Priority: Minor
>
> Using withOutput generates the following, notice that the hashcode is printed rather
than some useful detail as to the content of the maps:
> Nov 9, 2012 2:40:01 PM org.apache.hadoop.mrunit.TestDriver logError
> SEVERE: Missing expected output (null-0, org.apache.hadoop.io.MapWritable@e1) at position
0.
> Nov 9, 2012 2:40:01 PM org.apache.hadoop.mrunit.TestDriver logError
> SEVERE: Received unexpected output (null-0, org.apache.hadoop.io.MapWritable@2059) at
position 0.

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