CodecPool.getDecompressor(LzopCodec) always creates a brand-new decompressor.
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Key: HADOOP-4162
URL: https://issues.apache.org/jira/browse/HADOOP-4162
Project: Hadoop Core
Issue Type: Bug
Reporter: Hong Tang
CodecPool.getDecompressor(LzopCodec) always creates a brand-new decompressor. I
investigated the code, the reason seems to be the following:
LzopCodec inherits from LzoCodec. The getDecompressorType() method is supposed
to return the concrete Decompressor class type the specific Codec class
creates. In this case, LzopCodec creates LzopDecompressors and should return
LzopDecompressor.class. But instead, it uses the getDecompressorType() method
defined in the parent and returns LzoDecompressor.class.
This leads to CodecPool unable to properly recycle the decompressors.
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