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Posted to common-dev@hadoop.apache.org by "Radim Kolar (JIRA)" <ji...@apache.org> on 2012/07/24 22:48:34 UTC

[jira] [Created] (HADOOP-8619) WritableComparator must implement no-arg constructor

Radim Kolar created HADOOP-8619:
-----------------------------------

             Summary: WritableComparator must implement no-arg constructor
                 Key: HADOOP-8619
                 URL: https://issues.apache.org/jira/browse/HADOOP-8619
             Project: Hadoop Common
          Issue Type: Improvement
          Components: io
    Affects Versions: 3.0.0
            Reporter: Radim Kolar
             Fix For: 3.0.0, 2.0.0-alpha, 0.23.0
         Attachments: writable-comparator.txt

Because of reasons listed here: http://findbugs.sourceforge.net/bugDescriptions.html#SE_COMPARATOR_SHOULD_BE_SERIALIZABLE

comparators should be serializable. To make deserialization work, it is required that all superclasses have no-arg constructor. http://findbugs.sourceforge.net/bugDescriptions.html#SE_NO_SUITABLE_CONSTRUCTOR

Simply add no=arg constructor to  WritableComparator.

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