Make sure a socket doesn't get left in limbo if it is passed to Poller.add() after the Poller has stopped (which may happen with a long running request thread).
Make sure a socket doesn't get left in limbo if it is passed to Poller.add() after the Poller has stopped (which may happen with a long running request thread).

git-svn-id: 79cef5a5a257cc9dbe40a45ac190115b4780e2d0@1441920 13f79535-47bb-0310-9956-ffa450edef68

apache/tomcat,apache/tomcat,Nickname0806/Test_Q4,apache/tomcat,Nickname0806/Test_Q4,apache/tomcat,Nickname0806/Test_Q4,Nickname0806/Test_Q4,apache/tomcat