IPC server should set SO_KEEPALIVE to the accepted sockets
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Key: HADOOP-6459
URL: https://issues.apache.org/jira/browse/HADOOP-6459
Project: Hadoop Common
Issue Type: Improvement
Affects Versions: 0.20.1
Reporter: Qi Liu
When there is some unexpected network outage or client-side issue, the network
connection could stay alive forever, due to the lack of keep alive. We have
observed such dead connection in name node. Though it has no known performance
hits, but it is a waste of resource. Adding SO_KEEPALIVE to all accepted
sockets should not be heavy, since the keep alive TCP packets will only be sent
once every four hours.
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