Improvement to IPC
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Key: HADOOP-4853
URL: https://issues.apache.org/jira/browse/HADOOP-4853
Project: Hadoop Core
Issue Type: Improvement
Components: ipc
Affects Versions: 0.20.0
Reporter: Arun C Murthy
Assignee: Arun C Murthy
I'd like to propose an improvement for consideration given my experience of
working on HADOOP-4348:
Currently the first call doubles up as a 'connection setup' trigger. I'd like
to propose adding a new 'init' call which is always called by the clients for
connection setup. The advantages are:
* We could fold in the getProtocolVersion call into the setup call, this
ensures that the Server always checks for protocol versions, regardless of
whether the (malicious?) client does an explicit call for getProtocolVersion or
not.
* We could authorize the connection here.
* We could add to check to ensure that the Server instance actually implements
the protocol used by the client to communicate, rather than fail on the first
IPC call
The flip side being an extra round-trip.
Lets discuss.
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