Some alerts report cluster name to be null

03 Jul 2015 15:30:21,581 ERROR [alert-event-bus-2] AlertReceivedListener:213 - Unable to process alert metrics_monitor_process_percent for an invalid cluster named null
03 Jul 2015 15:30:21,585 ERROR [alert-event-bus-2] AlertReceivedListener:213 - Unable to process alert zookeeper_server_process_percent for an invalid cluster named null
03 Jul 2015 15:30:21,590 ERROR [alert-event-bus-2] AlertReceivedListener:213 - Unable to process alert hbase_regionserver_process_percent for an invalid cluster named null
03 Jul 2015 15:30:21,595 ERROR [alert-event-bus-1] AlertReceivedListener:213 - Unable to process alert yarn_nodemanager_webui_percent for an invalid cluster named null
03 Jul 2015 15:30:21,599 ERROR [alert-event-bus-2] AlertReceivedListener:213 - Unable to process alert storm_supervisor_process_percent for an invalid cluster named null
03 Jul 2015 15:30:21,602 ERROR [alert-event-bus-1] AlertReceivedListener:213 - Unable to process alert datanode_process_percent for an invalid cluster named null
03 Jul 2015 15:31:21,166 ERROR [alert-event-bus-1] AlertReceivedListener:213 - Unable to process alert datanode_storage_percent for an invalid cluster named null
03 Jul 2015 15:37:20,818 ERROR [alert-event-bus-1] AlertReceivedListener:231 - Unable to process alert zookeeper_server_process_percent for an invalid cluster named null
03 Jul 2015 15:37:22,478 ERROR [alert-event-bus-2] AlertReceivedListener:231 - Unable to process alert zookeeper_server_process_percent for an invalid cluster named null
03 Jul 2015 15:37:26,572 ERROR [alert-event-bus-1] AlertReceivedListener:231 - Unable to process alert datanode_process_percent for an invalid cluster named null
03 Jul 2015 15:37:26,580 ERROR [alert-event-bus-1] AlertReceivedListener:231 - Unable to process alert metrics_monitor_process_percent for an invalid cluster named null
03 Jul 2015 15:37:26,583 ERROR [alert-event-bus-2] AlertReceivedListener:231 - Unable to process alert datanode_storage_percent for an invalid cluster named null
03 Jul 2015 15:39:27,876 ERROR [alert-event-bus-1] AlertReceivedListener:231 - Unable to process alert storm_supervisor_process_percent for an invalid cluster named null
03 Jul 2015 15:40:28,658 ERROR [alert-event-bus-2] AlertReceivedListener:231 - Unable to process alert hbase_regionserver_process_percent for an invalid cluster named null
03 Jul 2015 17:14:17,305 ERROR [alert-event-bus-1] AlertReceivedListener:231 - Unable to process alert yarn_nodemanager_webui_percent for an invalid cluster named null