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  1. Hadoop Common
  2. HADOOP-8071

Avoid an extra packet in client code when nagling is disabled

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 0.23.1
    • Fix Version/s: 0.23.2
    • Component/s: ipc
    • Labels:
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    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      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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