Datanode.shutdown() and Namenode.stop() should close all rpc connections
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Key: HADOOP-2870
URL: https://issues.apache.org/jira/browse/HADOOP-2870
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.16.0
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.17.0
Currently this two cleanup methods do not close all existing rpc connections.
If a mini dfs cluster gets shutdown and then restarted as we do in
TestFileCreation, RPCs in second mini cluster reuse the unclosed connections
opened in the first run but there is no server running to serve the request. So
the client get stuck waiting for the response forever if client side timeout
gets removed as suggested by hadoop-2811.
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