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From "Gabriel Reid (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-71) PType mapping functions are not initialized before being used for deep copying
Date Thu, 20 Sep 2012 12:28:07 GMT
Gabriel Reid created CRUNCH-71:
----------------------------------

             Summary: 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


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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