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Posted to common-issues@hadoop.apache.org by "Yejun Yang (JIRA)" <ji...@apache.org> on 2015/05/20 09:24:00 UTC

[jira] [Created] (HADOOP-12007) GzipCodec native CodecPool leaks memory

Yejun Yang created HADOOP-12007:
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             Summary: 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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