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https://issues.apache.org/jira/browse/HADOOP-8522?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas updated HADOOP-8522:
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    Attachment: HADOOP-8522.07.patch

Fixed checkstyle issues, ran test-patch locally:
{noformat}
| Vote |      Subsystem |  Runtime   | Comment
============================================================================
|  +1  |       @author  |   0m  0s   | The patch does not contain any @author 
|      |                |            | tags.
|  +1  |    test4tests  |   0m  0s   | The patch appears to include 1 new or 
|      |                |            | modified test files.
|  +1  |    mvninstall  |  12m 54s   | trunk passed 
|  +1  |       compile  |  10m 37s   | trunk passed 
|  +1  |    checkstyle  |   0m 28s   | trunk passed 
|  +1  |       mvnsite  |   0m 48s   | trunk passed 
|  +1  |    mvneclipse  |   0m 18s   | trunk passed 
|  +1  |      findbugs  |   1m  6s   | trunk passed 
|  +1  |       javadoc  |   0m 51s   | trunk passed 
|  +1  |    mvninstall  |   0m 34s   | the patch passed 
|  +1  |       compile  |  10m  4s   | the patch passed 
|  +1  |         javac  |  10m  4s   | the patch passed 
|  +1  |    checkstyle  |   0m 34s   | the patch passed 
|  +1  |       mvnsite  |   0m 53s   | the patch passed 
|  +1  |    mvneclipse  |   0m 24s   | the patch passed 
|  +1  |    whitespace  |   0m  0s   | The patch has no whitespace issues. 
|  +1  |      findbugs  |   1m 15s   | the patch passed 
|  +1  |       javadoc  |   0m 51s   | the patch passed 
|  +1  |    asflicense  |   0m 32s   | The patch does not generate ASF License 
|      |                |            | warnings.
|      |                |  43m 22s   | 
{noformat}

> 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
>         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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