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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8522) ResetableGzipOutputStream creates invalid gzip files when finish() and resetState() are used
Date Sat, 11 Nov 2017 02:05:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16248278#comment-16248278
] 

Hudson commented on HADOOP-8522:
--------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13222 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/13222/])
HADOOP-8522. ResetableGzipOutputStream creates invalid gzip files when (cdouglas: rev 796a0d3a5c661f0c3b23af9c0db2d8f3db83c322)
* (add) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/TestGzipCodec.java
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/GzipCodec.java


> 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: 1.0.3, 2.0.0-alpha
>            Reporter: Mike Percy
>            Assignee: Mike Percy
>              Labels: BB2015-05-TBR
>             Fix For: 3.0.0
>
>         Attachments: HADOOP-8522-4.patch, HADOOP-8522.05.patch, HADOOP-8522.06.patch,
HADOOP-8522.07.patch
>
>
> 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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