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Posted to common-dev@hadoop.apache.org by "Mike Percy (JIRA)" <ji...@apache.org> on 2012/06/21 10:01:46 UTC

[jira] [Created] (HADOOP-8522) ResetableGzipOutputStream creates invalid gzip files when finish() and resetState() are used

Mike Percy created HADOOP-8522:
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             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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