Work around native heap leak in sun.nio.ch.Util affecting IncomingTcpConnection
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Key: CASSANDRA-2654
URL: https://issues.apache.org/jira/browse/CASSANDRA-2654
Project: Cassandra
Issue Type: Improvement
Components: Core
Affects Versions: 0.8.0 beta 2, 0.7.5, 0.6.13
Environment: OpenJDK Runtime Environment (IcedTea6 1.9.7)
(6b20-1.9.7-0ubuntu1~10.04.1)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)
Also observed on Sun/Oracle JDK. Probably platform- and os-independent.
Reporter: Hannes Schmidt
NIO's leaky, per-thread caching of direct buffers in combination with
IncomingTcpConnection's eager buffering of messages leads to leakage of large
amounts of native heap. Details in [1]. More on the root cause in [2]. Even
though it doesn't fix the leak, attached patch has been found to alleviate the
problem by keeping the size of each direct buffer modest.
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