The operation was canceled.

Failed to handle PublishMessage [requestId=4, acknowledge=false, excludeMe=true, discloseMe=false, retain=false, topic=clientToServerService.listener, exclude=null, eligible=null, arguments=[8, 9], argumentsKw=null] to org.springframework.messaging.support.ExecutorSubscribableChannel$SendTask@6384b140 in ch.rasc.wamp2spring.pubsub.PubSubMessageHandler@18a538a0, failedMessage=PublishMessage [requestId=4, acknowledge=false, excludeMe=true, discloseMe=false, retain=false, topic=clientToServerService.listener, exclude=null, eligible=null, arguments=[8, 9], argumentsKw=null]