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From "Gabriel Reid (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CRUNCH-71) PType mapping functions are not initialized before being used for deep copying
Date Thu, 20 Sep 2012 18:28:08 GMT

     [ https://issues.apache.org/jira/browse/CRUNCH-71?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gabriel Reid resolved CRUNCH-71.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 0.4.0
    
> PType mapping functions are not initialized before being used for deep copying
> ------------------------------------------------------------------------------
>
>                 Key: CRUNCH-71
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-71
>             Project: Crunch
>          Issue Type: Bug
>    Affects Versions: 0.3.0
>            Reporter: Gabriel Reid
>            Assignee: Gabriel Reid
>             Fix For: 0.4.0
>
>         Attachments: CRUNCH-71.patch
>
>
> The PType#getDetachedValue method performs a deep copy (if needed) in order to allow
DoFns to hold on to values that have been passed through them (for example, in join functions).
> The WritablePType class uses the built-in input and output MapFns in the PType to handle
this deep copying, but the input and output MapFns don't get initialized (i.e. initialize
isn't called on them) after they are deserialized along with the DoFn that is using them.
In some rare cases (at least for tuples), this can result in NullPointerExceptions or other
nastiness.

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