Error

2018-09-13 14:47:42.989  INFO 1 --- [cTaskExecutor-1] c.f.c.d.m.a.l.WorkflowLaunchingListener  : Received workflow launching message: WorkflowLaunchingMessage[workflowId=05520172-ca48-4136-8c59-3ae2cc8254fb, workflowStepId=94cee9bf-0329-471d-a27c-b3559967f63b, workflowName='null', jobId=66, dataUploadIds=null, userApiKey='********7Ye6', totalWorkflowRows=3]
2018-09-13 14:47:42.990  WARN 1 --- [cTaskExecutor-1] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.
2018-09-13T14:47:42.990526574Z 
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener method 'public void com.figureeight.client.data.materializer.api.listener.WorkflowLaunchingListener.receiveWorkflowLaunchingMessage(com.figureeight.client.data.materializer.api.domain.broker.WorkflowLaunchingMessage)' threw exception
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:190) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:120) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1414) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1337) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1324) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1303) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:817) [spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:801) [spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$700(SimpleMessageListenerContainer.java:77) [spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1042) [spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at java.base/java.lang.Thread.run(Thread.java:844) [na:na]
Caused by: java.lang.NullPointerException: null
at com.figureeight.client.data.materializer.api.listener.WorkflowLaunchingListener.receiveWorkflowLaunchingMessage(WorkflowLaunchingListener.java:48) ~[classes!/:na]
at jdk.internal.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:181) ~[spring-messaging-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:114) ~[spring-messaging-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:51) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:182) ~[spring-rabbit-2.0.4.RELEASE.jar!/:2.0.4.RELEASE]
... 10 common frames omitted