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https://issues.apache.org/jira/browse/HADOOP-12007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14552330#comment-14552330
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Ravi Prakash commented on HADOOP-12007:
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What version of Hadoop are you using Yejun?
> GzipCodec native CodecPool leaks memory
> ---------------------------------------
>
> Key: HADOOP-12007
> URL: https://issues.apache.org/jira/browse/HADOOP-12007
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Yejun Yang
>
> org/apache/hadoop/io/compress/GzipCodec.java call
> CompressionCodec.Util.createOutputStreamWithCodecPool to use CodecPool. But
> compressor objects are actually never returned to pool which cause memory
> leak.
> HADOOP-10591 uses CompressionOutputStream.close() to return Compressor object
> to pool. But CompressionCodec.Util.createOutputStreamWithCodecPool actually
> returns a CompressorStream which overrides close().
> This cause CodecPool.returnCompressor never being called. In my log file I
> can see lots of "Got brand-new compressor [.gz]" but no "Got recycled
> compressor".
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