Avoid an extra packet in client code when nagling is disabled
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Key: HADOOP-8071
URL: https://issues.apache.org/jira/browse/HADOOP-8071
Project: Hadoop Common
Issue Type: Improvement
Components: ipc
Affects Versions: 0.23.1
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
Currently, if you disable TCP_NODELAY in the IPC client, you get an extra
packet for each call which contains the call's length. This is unnecessary.
Instead, we can just reserve the 4 bytes in the buffer up front, then go back
to fill it in before pushing the call to the wire.
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