RPC.waitForProxy should retry through NoRouteToHostException
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Key: HADOOP-6667
URL: https://issues.apache.org/jira/browse/HADOOP-6667
Project: Hadoop Common
Issue Type: Improvement
Components: ipc
Affects Versions: 0.21.0, 0.22.0
Reporter: Todd Lipcon
Priority: Minor
RPC.waitForProxy already loops through ConnectExceptions, but
NoRouteToHostException is not a subclass of ConnectException. In the case that
the NN is on a VIP, the No Route To Host error is reasonably common during a
failover, so we should retry through it just the same as the other connection
errors.
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