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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6803) ZlibCompressor hangs on close
Date Wed, 02 Jun 2010 23:37:53 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12874861#action_12874861
] 

Chris Douglas commented on HADOOP-6803:
---------------------------------------

Isn't the {{finished}} member set by the JNI code?

> ZlibCompressor hangs on close
> -----------------------------
>
>                 Key: HADOOP-6803
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6803
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 0.21.0, 0.22.0
>
>         Attachments: hadoop-6803-1.patch
>
>
> Looking at ZlibCompressor I noticed that the finished member is never modified, and is
therefore always false. This means ZlibCompressor#finished will always return false so CompressorStream#close
loops indefinitely in finish:
> {code} 
>       while (!compressor.finished()) {
>         compress();
>       }
> {code}
> I modifed TestCodec#testGzipCodecWrite to also cover writing using the native lib and
confirmed the hang with jstack. The fix is simple, ZlibCompressor should record when it's
been finished.

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