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From "Rahul Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CRUNCH-54) MSCRPlanner throws NPE while writing back a file using a materialized Pcollection
Date Thu, 30 Aug 2012 05:39:07 GMT

     [ https://issues.apache.org/jira/browse/CRUNCH-54?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rahul Sharma updated CRUNCH-54:
-------------------------------

    Attachment: CRUNCH-54-NPE-from-MCSPlanner.patch

The collection gets materialized into a new inputCollection which has outgoing edges in the
graph. So the output target has been changed to contain the input collection if materialized
else the collection itself. Also added a test case for the same. 
                
> MSCRPlanner throws NPE while writing back a file using a materialized Pcollection
> ---------------------------------------------------------------------------------
>
>                 Key: CRUNCH-54
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-54
>             Project: Crunch
>          Issue Type: Bug
>          Components: IO
>            Reporter: Rahul Sharma
>         Attachments: CRUNCH-54-NPE-from-MCSPlanner.patch, MrPipelinetTest.java
>
>
> When we try to write back a materialized collection to a file using the To.Text(..) the
MCSPlanner throws back a NPE. 
> java.lang.NullPointerException
> 	at org.apache.crunch.impl.mr.plan.MSCRPlanner.constructJobPrototypes(MSCRPlanner.java:192)
> 	at org.apache.crunch.impl.mr.plan.MSCRPlanner.plan(MSCRPlanner.java:98)
> 	at org.apache.crunch.impl.mr.MRPipeline.run(MRPipeline.java:116)
> 	at org.apache.crunch.MrPipelinetTest.pipelineShouldNotFail(MrPipelinetTest.java:41)
> 	

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