RHEV : Json enabled Hosts goes into Non-responsive state

Issue

• Hosts reporting as Non-responsive in RHEV GUI.
• Fencing or rebooting the hosts does not help.
• RHEV-M can ping unresponsive hosts.
• RHEV-M can telnet to hosts port 54321 (vdsm).
• Following errors can bee see in RHEV-M engine.log.

2016-04-23 03:30:18,072 WARN  [org.ovirt.vdsm.jsonrpc.client.utils.retry.Retryable] (SSL Stomp Reactor) Retry failed
2016-04-23 03:30:18,072 ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (DefaultQuartzScheduler_Worker-68) Exception during connection
2016-04-23 03:30:18,072 INFO  [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) Connecting to /192.168.xxx.xxx
    at org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient$1.call(ReactorClient.java:113) [vdsm-jsonrpc-java-client.jar:]
    at org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient$1.call(ReactorClient.java:97) [vdsm-jsonrpc-java-client.jar:]
    at org.ovirt.vdsm.jsonrpc.client.utils.retry.Retryable.call(Retryable.java:26) [vdsm-jsonrpc-java-client.jar:]
    at org.ovirt.vdsm.jsonrpc.client.utils.ReactorScheduler.performPendingOperations(ReactorScheduler.java:28) [vdsm-jsonrpc-java-client.jar:]
    at org.ovirt.vdsm.jsonrpc.client.reactors.Reactor.run(Reactor.java:60) [vdsm-jsonrpc-java-client.jar:]
2016-04-23 03:30:18,231 INFO  [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) Connecting to /192.168.xxx.xxx
2016-04-03 05:16:54,603 WARN  [org.ovirt.vdsm.jsonrpc.client.internal.ResponseWorker] (ResponseWorker) Exception thrown during message processing