将RabbitMQ与Spring Websockets一起使用时，在websocket关闭期间，Reactor会发生异常，如下所示：
2015-03-30 11:37:23.647 [reactor-tcp-io-1] DEBUG o.s.m.s.s.StompBrokerRelayMessageHandler - Failure while clearing TCP connection state in session 39cb9vbm
java.util.NoSuchElementException: null
at com.gs.collections.impl.list.mutable.MutableIterator.next(MutableIterator.java:57) ~[gs-collections-5.1.0.jar:na]
at com.gs.collections.impl.list.mutable.MultiReaderFastList$UntouchableListIterator.next(MultiReaderFastList.java:1267) ~[gs-collections-5.1.0.jar:na]
at reactor.event.registry.CachingRegistry$2.value(CachingRegistry.java:70) ~[reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.registry.CachingRegistry$2.value(CachingRegistry.java:67) ~[reactor-core-1.1.5.RELEASE.jar:na]
at com.gs.collections.impl.list.mutable.MultiReaderFastList.withWriteLockAndDelegate(MultiReaderFastList.java:179) ~[gs-collections-5.1.0.jar:na]
at reactor.event.registry.CachingRegistry.unregister(CachingRegistry.java:67) ~[reactor-core-1.1.5.RELEASE.jar:na]
at reactor.net.AbstractNetChannel.close(AbstractNetChannel.java:185) [reactor-net-1.1.5.RELEASE.jar:na]
at org.springframework.messaging.tcp.reactor.Reactor11TcpConnection.close(Reactor11TcpConnection.java:63) ~[spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler$StompConnectionHandler.clearConnection(StompBrokerRelayMessageHandler.java:808) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler$StompConnectionHandler.afterDisconnectSent(StompBrokerRelayMessageHandler.java:777) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler$StompConnectionHandler.access$3100(StompBrokerRelayMessageHandler.java:496) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler$StompConnectionHandler$3.onSuccess(StompBrokerRelayMessageHandler.java:749) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler$StompConnectionHandler$3.onSuccess(StompBrokerRelayMessageHandler.java:745) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.util.concurrent.ListenableFutureCallbackRegistry.success(ListenableFutureCallbackRegistry.java:119) [spring-core-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.messaging.tcp.reactor.AbstractPromiseToListenableFutureAdapter$1.accept(AbstractPromiseToListenableFutureAdapter.java:57) [spring-messaging-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at reactor.core.action.CallbackAction.doAccept(CallbackAction.java:36) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.action.Action.accept(Action.java:52) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.action.Action.accept(Action.java:32) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.routing.ArgumentConvertingConsumerInvoker.invoke(ArgumentConvertingConsumerInvoker.java:73) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.routing.ConsumerFilteringEventRouter.route(ConsumerFilteringEventRouter.java:78) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.dispatch.SynchronousDispatcher.dispatch(SynchronousDispatcher.java:75) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.Reactor.notify(Reactor.java:242) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.Reactor.notify(Reactor.java:249) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.Reactor.notify(Reactor.java:57) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.composable.Composable.notifyValue(Composable.java:494) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.composable.Promise.notifyValue(Promise.java:571) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.composable.Deferred.acceptEvent(Deferred.java:118) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.composable.Deferred.accept(Deferred.java:83) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.net.netty.NettyNetChannel$2.operationComplete(NettyNetChannel.java:101) [reactor-net-1.1.5.RELEASE.jar:na]
at reactor.net.netty.NettyNetChannel$2.operationComplete(NettyNetChannel.java:89) [reactor-net-1.1.5.RELEASE.jar:na]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:682) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.util.concurrent.DefaultPromise.notifyLateListener(DefaultPromise.java:624) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.util.concurrent.DefaultPromise.addListener(DefaultPromise.java:144) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:93) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:28) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at reactor.net.netty.NettyNetChannel.write(NettyNetChannel.java:89) [reactor-net-1.1.5.RELEASE.jar:na]
at reactor.net.netty.NettyNetChannel.write(NettyNetChannel.java:83) [reactor-net-1.1.5.RELEASE.jar:na]
at reactor.net.AbstractNetChannel.write(AbstractNetChannel.java:239) [reactor-net-1.1.5.RELEASE.jar:na]
at reactor.net.AbstractNetChannel$WriteConsumer.accept(AbstractNetChannel.java:308) [reactor-net-1.1.5.RELEASE.jar:na]
at reactor.core.Reactor$5.accept(Reactor.java:373) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.core.Reactor$5.accept(Reactor.java:370) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.routing.ArgumentConvertingConsumerInvoker.invoke(ArgumentConvertingConsumerInvoker.java:73) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.routing.ConsumerFilteringEventRouter.route(ConsumerFilteringEventRouter.java:103) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.dispatch.AbstractLifecycleDispatcher.route(AbstractLifecycleDispatcher.java:64) [reactor-core-1.1.5.RELEASE.jar:na]
at reactor.event.dispatch.AbstractMultiThreadDispatcher$MultiThreadTask.run(AbstractMultiThreadDispatcher.java:55) [reactor-core-1.1.5.RELEASE.jar:na]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:370) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:353) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [netty-all-4.0.20.Final.jar:4.0.20.Final]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_31]
如果使用SimpleBroker，则不会发生此异常。
我们使用以下版本：
我们的配置非常简单：
public class WebSocketConfig extends WebSocketMessageBrokerConfigurationSupport {
@Autowired
private SessionRepository sessionRepository;
@Autowired
private ApplicationEventPublisher eventPublisher;
@Value("${rabbitmq.enabled=true}")
private boolean rabbitMqEnabled;
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/stomp")
.setHandshakeHandler(new DefaultHandshakeHandler(new TomcatRequestUpgradeStrategy()))
.addInterceptors(sessionRepositoryInterceptor())
.withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
if (rabbitMqEnabled) {
registry.enableStompBrokerRelay("/topic", "/queue")
.setClientLogin("....").setClientPasscode("....")
.setSystemLogin("....").setSystemPasscode("....")
.setRelayHost("....").setRelayPort(....)
.setVirtualHost("....");
} else {
registry.enableSimpleBroker("/topic", "/queue");
}
registry.setApplicationDestinationPrefixes("/ws");
}
...
}
任何想法或指导？
答案 0 :(得分：0)
已被Spring开发者标记为预期行为。
对于遇到这种情况的人来说，将StompBrokerRelayMessageHandler的日志记录调低为INFO可能会有所帮助。
对于logback：
<logger name="org.springframework.messaging.simp.stomp.StompBrokerRelayMessageHandler" level="INFO"/>