Getting java.io.IOException: JMX connection closed. when manually ran repair on pratition range of a keyspace using nodetool

Question

[2016-07-06 17:28:51,593] Lost notification. You should check server log for repair status of keyspace operations
Exception occurred during clean-up. java.lang.reflect.UndeclaredThrowableException error: JMX connection closed. You should check server log for repair status of key space operations(Subsequent keyspaces are not going to be repaired).
-- StackTrace --
java.io.IOException: JMX connection closed. You should check server log for repair status of keyspace operations(Subsequent keyspaces are not going to be repaired). at org.apache.cassandra.tools.RepairRunner.handleNotification(NodeProbe.ja va:1485) at javax.management.NotificationBroadcasterSupport.handleNotification(Unkn own Source) at javax.management.NotificationBroadcasterSupport$SendNotifJob.run(Unknow n Source) at javax.management.NotificationBroadcasterSupport$1.execute(Unknown Sourc e) at javax.management.NotificationBroadcasterSupport.sendNotification(Unknow n Source) at javax.management.remote.rmi.RMIConnector.sendNotification(Unknown Sourc e) at javax.management.remote.rmi.RMIConnector.access$1200(Unknown Source) at javax.management.remote.rmi.RMIConnector$RMIClientCommunicatorAdmin.got IOException(Unknown Source) at javax.management.remote.rmi.RMIConnector$RMINotifClient.fetchNotifs(Unk nown Source) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.fetchOneN otif(Unknown Source) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.fetchNoti fs(Unknown Source) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.doRun(Unk nown Source) at com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.run(Unkno wn Source) at com.sun.jmx.remote.internal.ClientNotifForwarder$LinearExecutor$1.run(U nknown Source)