Colin Patrick McCabe created HADOOP-10116:
---------------------------------------------

             Summary: fix "inconsistent synchronization" warnings in 
ZlibCompressor
                 Key: HADOOP-10116
                 URL: https://issues.apache.org/jira/browse/HADOOP-10116
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Colin Patrick McCabe


Fix findbugs warnings in ZlibCompressor.  I believe these were introduced by 
HADOOP-10047.

{code}
Code    Warning
IS      Inconsistent synchronization of 
org.apache.hadoop.io.compress.zlib.ZlibCompressor.keepUncompressedBuf; locked 
57% of time
IS      Inconsistent synchronization of 
org.apache.hadoop.io.compress.zlib.ZlibCompressor.userBuf; locked 60% of time
IS      Inconsistent synchronization of 
org.apache.hadoop.io.compress.zlib.ZlibCompressor.userBufLen; locked 85% of time
IS      Inconsistent synchronization of 
org.apache.hadoop.io.compress.zlib.ZlibDecompressor.userBuf; locked 60% of time
IS      Inconsistent synchronization of 
org.apache.hadoop.io.compress.zlib.ZlibDecompressor.userBufLen; locked 77% of 
time
Dodgy Warnings

Code    Warning
DLS     Dead store to pos2 in 
org.apache.hadoop.io.compress.zlib.ZlibCompressor.put(ByteBuffer, ByteBuffer)
DLS     Dead store to pos2 in 
org.apache.hadoop.io.compress.zlib.ZlibDecompressor.put(ByteBuffer, ByteBuffer)
{code}



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