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From "Mike Percy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8522) ResetableGzipOutputStream creates invalid gzip files when finish() and resetState() are used
Date Thu, 21 Jun 2012 08:01:46 GMT
Mike Percy created HADOOP-8522:
----------------------------------

             Summary: ResetableGzipOutputStream creates invalid gzip files when finish() and
resetState() are used
                 Key: HADOOP-8522
                 URL: https://issues.apache.org/jira/browse/HADOOP-8522
             Project: Hadoop Common
          Issue Type: Bug
          Components: io
    Affects Versions: 2.0.0-alpha, 1.0.3
            Reporter: Mike Percy


ResetableGzipOutputStream creates invalid gzip files when finish() and resetState() are used.
The issue is that finish() flushes the compressor buffer and writes the gzip CRC32 + data
length trailer. After that, resetState() does not repeat the gzip header, but simply starts
writing more deflate-compressed data. The resultant files are not readable by the Linux "gunzip"
tool. ResetableGzipOutputStream should write valid multi-member gzip files.

The gzip format is specified in [RFC 1952|https://tools.ietf.org/html/rfc1952].


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