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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14376) Memory leak when reading a compressed file using the native library
Date Fri, 12 May 2017 22:08:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jason Lowe updated HADOOP-14376:
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.8.2
           Status: Resolved  (was: Patch Available)

Thanks, Eli!  I committed this to trunk, branch-2, branch-2.8, and branch-2.7.

> Memory leak when reading a compressed file using the native library
> -------------------------------------------------------------------
>                 Key: HADOOP-14376
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14376
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common, io
>    Affects Versions: 2.7.0
>            Reporter: Eli Acherkan
>            Assignee: Eli Acherkan
>             Fix For: 2.9.0, 2.7.4, 3.0.0-alpha3, 2.8.2
>         Attachments: Bzip2MemoryTester.java, HADOOP-14376.001.patch, HADOOP-14376.002.patch,
HADOOP-14376.003.patch, HADOOP-14376.004.patch, log4j.properties
> Opening and closing a large number of bzip2-compressed input streams causes the process
to be killed on OutOfMemory when using the native bzip2 library.
> Our initial analysis suggests that this can be caused by {{DecompressorStream}} overriding
the {{close()}} method, and therefore skipping the line from its parent: {{CodecPool.returnDecompressor(trackedDecompressor)}}.
When the decompressor object is a {{Bzip2Decompressor}}, its native {{end()}} method is never
called, and the allocated memory isn't freed.
> If this analysis is correct, the simplest way to fix this bug would be to replace {{in.close()}}
with {{super.close()}} in {{DecompressorStream}}.

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