apache/storm — pull request #349 by tedxia (2014-12-15 10:00:38+00:00)
Title: STORM-593: remove endpoint-socket-lock for worker-data

PR for [STORM-593](https://issues.apache.org/jira/browse/STORM-593)

cached-node+port->socket in worker-data is atom, there on need for rwlock endpoint-socket-lock to protect cached-node+port->socket. And after use rwlock, there will be competition between refresh-connections and message send.