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From "Rahul Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CRUNCH-55) MemPipeline doesn't correctly initialize PTypes MapFns
Date Wed, 12 Sep 2012 05:41:07 GMT

     [ https://issues.apache.org/jira/browse/CRUNCH-55?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rahul Sharma updated CRUNCH-55:
-------------------------------

    Attachment: WritableIT.java

I think this is not just with MemPipeline, MRPipelines also have the same issue. I have attached
a testcase that has Ptype doing things in initialize. This one fails for both pipelines.

Can someone tell me if my test case is right ? 
                
> MemPipeline doesn't correctly initialize PTypes MapFns
> ------------------------------------------------------
>
>                 Key: CRUNCH-55
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-55
>             Project: Crunch
>          Issue Type: Bug
>    Affects Versions: 0.3.0, 0.4.0
>            Reporter: Gabriel Reid
>         Attachments: WritableIT.java
>
>
> When a MemPipeline is run, the setContext method (and therefore also the initialize method)
is not called on the MapFns in PTypes. On PTypes MapFns that rely on logic in the initialize
method, this causes the pipeline to crash.
> This can be shown by using PTable#join with Writable values -- a NullPointerException
occurs due to the state of the PType input or output MapFn not being fully set up.

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