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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8419) GzipCodec NPE upon reset with IBM JDK
Date Sun, 20 May 2012 04:24:41 GMT
Luke Lu created HADOOP-8419:
-------------------------------

             Summary: GzipCodec NPE upon reset with IBM JDK
                 Key: HADOOP-8419
                 URL: https://issues.apache.org/jira/browse/HADOOP-8419
             Project: Hadoop Common
          Issue Type: Bug
          Components: io
    Affects Versions: 1.0.3
            Reporter: Luke Lu
            Assignee: Luke Lu


The GzipCodec will NPE upon reset after finish when the native zlib codec is not loaded. When
the native zlib is loaded the codec creates a CompressorOutputStream that doesn't have the
problem, otherwise, the GZipCodec uses GZIPOutputStream which is extended to provide the resetState
method. Since IBM JDK 6 SR9 FP2 including the current JDK 6 SR10, GZIPOutputStream#finish
will release the underlying deflater, which causes NPE upon reset. This seems to be an IBM
JDK quirk as Sun JDK and OpenJDK doesn't have this issue.

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