在某些应用程序中,我看到人们正在使用EnableEurekaClient.其他一些示例应用程序正在使用EnableDiscoveryClient.
这两者有什么区别吗？
我正在测试spring-cloud-starter-stream-kafka。出现以下错误。
org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for channel 'unknown.channel.name'.; nested exception is org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:81)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:442)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:392)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:231)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:154)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:102)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:105)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
at org.springframework.integration.channel.FixedSubscriberChannel.send(FixedSubscriberChannel.java:69)
at org.springframework.integration.channel.FixedSubscriberChannel.send(FixedSubscriberChannel.java:63)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:105)
at org.springframework.integration.kafka.inbound.KafkaMessageDrivenChannelAdapter.access$300(KafkaMessageDrivenChannelAdapter.java:43)
at org.springframework.integration.kafka.inbound.KafkaMessageDrivenChannelAdapter$AutoAcknowledgingChannelForwardingMessageListener.doOnMessage(KafkaMessageDrivenChannelAdapter.java:171)
at org.springframework.integration.kafka.listener.AbstractDecodingMessageListener.onMessage(AbstractDecodingMessageListener.java:50)
at org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder$4$1.doWithRetry(KafkaMessageChannelBinder.java:607)
at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:263)
at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:154)
at org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder$4.onMessage(KafkaMessageChannelBinder.java:604)
at org.springframework.integration.kafka.listener.QueueingMessageListenerInvoker$KafkaMessageDispatchingSubscriber.onNext(QueueingMessageListenerInvoker.java:221)
at org.springframework.integration.kafka.listener.QueueingMessageListenerInvoker$KafkaMessageDispatchingSubscriber.onNext(QueueingMessageListenerInvoker.java:209)
at reactor.core.processor.util.RingBufferSubscriberUtils.route(RingBufferSubscriberUtils.java:67)
at reactor.core.processor.RingBufferProcessor$BatchSignalProcessor.run(RingBufferProcessor.java:789)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at …用android收集用户指纹是否可行？我们的后端系统有一个指纹数据库.我们想匹配针对数据库收集的指纹,看看是否匹配.