Hi!
We have a NPE when handling Events and get the following stacktrace:
`
org.axonframework.messaging.annotation.MessageHandlerInvocationException:
Error handling event of type [class
de.lvm.serviceprozesse.zaehlwerk.domain.api.events.MitarbeiterEntsperrtEvent]
in aggregate
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregateMetaModelFactory$AnnotatedAggregateModel.lambda$doPublish$7(AnnotatedAggregateMetaModelFactory.java:223)
at java.util.Optional.ifPresent(Optional.java:159)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregateMetaModelFactory$AnnotatedAggregateModel.doPublish(AnnotatedAggregateMetaModelFactory.java:218)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregateMetaModelFactory$AnnotatedAggregateModel.publish(AnnotatedAggregateMetaModelFactory.java:213)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregate.publish(AnnotatedAggregate.java:200)
at
org.axonframework.eventsourcing.EventSourcedAggregate.publish(EventSourcedAggregate.java:158)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregate.doApply(AnnotatedAggregate.java:234)
at
org.axonframework.eventsourcing.EventSourcedAggregate.doApply(EventSourcedAggregate.java:148)
at
org.axonframework.commandhandling.model.AggregateLifecycle.apply(AggregateLifecycle.java:67)
at
de.lvm.serviceprozesse.zaehlwerk.domain.api.VerteilOrganisation.mitarbeiterEntsperren(VerteilOrganisation.java:766)
at
de.lvm.serviceprozesse.zaehlwerk.domain.internal.commandhandler.VerteilOrganisationCommandHandler.lambda$null$32(VerteilOrganisationCommandHandler.java:341)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregate.lambda$execute$2(AnnotatedAggregate.java:174)
at
org.axonframework.commandhandling.model.AggregateLifecycle.lambda$execute$3(AggregateLifecycle.java:199)
at
org.axonframework.commandhandling.model.AggregateLifecycle.executeWithResult(AggregateLifecycle.java:166)
at
org.axonframework.commandhandling.model.AggregateLifecycle.execute(AggregateLifecycle.java:198)
at
org.axonframework.commandhandling.model.inspection.AnnotatedAggregate.execute(AnnotatedAggregate.java:174)
at
org.axonframework.commandhandling.model.LockAwareAggregate.execute(LockAwareAggregate.java:92)
at
de.lvm.serviceprozesse.zaehlwerk.domain.internal.commandhandler.VerteilOrganisationCommandHandler.lambda$handle$33(VerteilOrganisationCommandHandler.java:340)
at
de.lvm.serviceprozesse.zaehlwerk.domain.internal.commandhandler.VerteilOrganisationCommandHandler.exceptionBarrier(VerteilOrganisationCommandHandler.java:588)
at
de.lvm.serviceprozesse.zaehlwerk.domain.internal.commandhandler.VerteilOrganisationCommandHandler.handle(VerteilOrganisationCommandHandler.java:337)
at sun.reflect.GeneratedMethodAccessor194.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.axonframework.messaging.annotation.AnnotatedMessageHandlingMember.handle(AnnotatedMessageHandlingMember.java:127)
at
org.axonframework.messaging.annotation.WrappedMessageHandlingMember.handle(WrappedMessageHandlingMember.java:61)
at
org.axonframework.commandhandling.AnnotationCommandHandlerAdapter.handle(AnnotationCommandHandlerAdapter.java:97)
at
org.axonframework.commandhandling.AnnotationCommandHandlerAdapter.handle(AnnotationCommandHandlerAdapter.java:41)
at sun.reflect.GeneratedMethodAccessor186.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.axonframework.spring.config.AbstractAnnotationHandlerBeanPostProcessor$AdapterIntroductionInterceptor.invoke(AbstractAnnotationHandlerBeanPostProcessor.java:252)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at
org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673)
at
de.lvm.serviceprozesse.zaehlwerk.domain.internal.commandhandler.VerteilOrganisationCommandHandler$$EnhancerBySpringCGLIB$$ff278d74.handle()
at
org.axonframework.messaging.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:57)
at
org.axonframework.messaging.interceptors.CorrelationDataInterceptor.handle(CorrelationDataInterceptor.java:55)
at
org.axonframework.messaging.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:55)
at
org.axonframework.messaging.unitofwork.DefaultUnitOfWork.executeWithResult(DefaultUnitOfWork.java:69)
at
org.axonframework.commandhandling.SimpleCommandBus.handle(SimpleCommandBus.java:156)
at
org.axonframework.commandhandling.SimpleCommandBus.doDispatch(SimpleCommandBus.java:127)
at
org.axonframework.commandhandling.SimpleCommandBus.dispatch(SimpleCommandBus.java:91)
at
org.axonframework.commandhandling.gateway.RetryingCallback$RetryDispatch.run(RetryingCallback.java:116)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException: null
`
The root cause is printed as the exception message only:
Caused by: java.lang.NullPointerException: null`
`
Therefore it’s very hard to find the real cause of this NPE :-/.
Does someone knows this problem? Does Axon suppresses something here?
We are using logback for logging. So from that side the stacktrace output should be fine.