RPC Server can leave a lot of direct buffers
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Key: HADOOP-4797
URL: https://issues.apache.org/jira/browse/HADOOP-4797
Project: Hadoop Core
Issue Type: Bug
Components: ipc
Affects Versions: 0.17.0
Reporter: Raghu Angadi
Assignee: Raghu Angadi
RPC server unwittingly can soft-leak direct buffers. One observed case is that
one of the namenodes at Yahoo took 40GB of virtual memory though it was
configured for 24GB memory. Most of the memory outside Java heap expected to be
direct buffers. This shown to be because of how RPC server reads and writes
serialized data. The cause and proposed fix are in following comment.
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