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From "Stephane Routhiau (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCORE-390) Performance issue on AbstractNIOConnPool
Date Wed, 10 Sep 2014 14:39:28 GMT
Stephane Routhiau created HTTPCORE-390:

             Summary: Performance issue on AbstractNIOConnPool
                 Key: HTTPCORE-390
                 URL: https://issues.apache.org/jira/browse/HTTPCORE-390
             Project: HttpComponents HttpCore
          Issue Type: Improvement
          Components: HttpCore NIO
    Affects Versions: 4.3.2
            Reporter: Stephane Routhiau

AbstractNIOConnPool use a ReentrantLock for lease and release connection.
We have noticed important contention when we try to use hundreds of connexions to the same
host, the lock is to vast.

I managed to rework a part of the code so there is no more use of a ReentrantLock, but use
of ConcurrentHashMap and so on.

The unit tests are ok and the load tests we have made on the patch version are about 40 %
faster under heavy load

Please find attached patch file againt http-nio 4.3.2 and the modified sources files of http-nio

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