JobCompletionService throws FalconException

2016-01-18 11:42:57,916 DEBUG - [ActiveMQ Session Task-34:] ~ Retrieving details for job 0000684-160118061527782-oozie-oozi-W  (OozieDAGEngine:296)
2016-01-18 11:42:57,923 DEBUG - [ActiveMQ Session Task-34:] ~ Notifying org.apache.falcon.execution.FalconExecutionService@3e08b6cf with event PROCESS/processMerlinOozie/ProcessMultipleClustersTest-corp-0f588e71/2016-01-18-11-34 (JobCompletionService:155)
2016-01-18 11:42:57,923 ERROR - [ActiveMQ Session Task-34:] ~ Error in listener org.apache.falcon.notification.service.impl.JobCompletionService (WorkflowJobEndNotificationService:245)
org.apache.falcon.FalconException: Target executor for PROCESS/processMerlinOozie/ProcessMultipleClustersTest-corp-0f588e71/2016-01-18-11-34 does not exist.
	at org.apache.falcon.execution.FalconExecutionService.onEvent(FalconExecutionService.java:129)
	at org.apache.falcon.notification.service.impl.JobCompletionService.onEnd(JobCompletionService.java:156)
	at org.apache.falcon.notification.service.impl.JobCompletionService.onSuccess(JobCompletionService.java:126)
	at org.apache.falcon.workflow.WorkflowJobEndNotificationService.notifyWorkflowEnd(WorkflowJobEndNotificationService.java:235)
	at org.apache.falcon.workflow.WorkflowJobEndNotificationService.notifySuccess(WorkflowJobEndNotificationService.java:105)
	at org.apache.falcon.messaging.JMSMessageConsumer.invokeListener(JMSMessageConsumer.java:218)
	at org.apache.falcon.messaging.JMSMessageConsumer.onMessage(JMSMessageConsumer.java:121)
	at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1393)
	at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
	at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
	at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:133)
	at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)