icodening opened a new issue, #11760: URL: https://github.com/apache/dubbo/issues/11760
断点如图所示 <img width="862" alt="image" src="https://user-images.githubusercontent.com/42876375/223464666-524c6c91-46e8-41cf-96dd-37862c22f3b0.png";> 异常堆栈如下 ```` org.apache.dubbo.rpc.RpcException: Failed to invoke remote proxy method greetStream to registry://127.0.0.1:2181/org.apache.dubbo.registry.RegistryService?application=tri-stub-server&dubbo=2.0.2&executor-management-mode=default&file.cache=true&pid=44013&proxy=nativestub®istry=zookeeper&release=3.2.0-beta.5×tamp=1678202159924, cause: / by zero at org.apache.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:135) at org.apache.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:55) at org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56) at org.apache.dubbo.rpc.filter.ClassLoaderCallbackFilter.invoke(ClassLoaderCallbackFilter.java:38) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:79) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:45) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:101) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:54) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.metrics.filter.MetricsFilter.invoke(MetricsFilter.java:49) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:192) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:54) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:41) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.ProfilerServerFilter.invoke(ProfilerServerFilter.java:63) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:144) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:327) at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CallbackRegistrationInvoker.invoke(FilterChainBuilder.java:194) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCallListener.invoke(AbstractServerCallListener.java:65) at org.apache.dubbo.rpc.protocol.tri.call.BiStreamServerCallListener.<init>(BiStreamServerCallListener.java:34) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall.startInternalCall(AbstractServerCall.java:386) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall.startCall(AbstractServerCall.java:119) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall.onHeader(AbstractServerCall.java:114) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.processHeader(TripleServerStream.java:425) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.lambda$onHeader$0(TripleServerStream.java:328) at org.apache.dubbo.common.threadpool.serial.SerializingExecutor.run(SerializingExecutor.java:102) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:833) Caused by: java.lang.ArithmeticException: / by zero at org.apache.dubbo.sample.tri.stub.GreeterImpl.greetStream(GreeterImpl.java:212) at org.apache.dubbo.rpc.stub.BiStreamMethodHandler.invoke(BiStreamMethodHandler.java:35) at org.apache.dubbo.rpc.stub.StubInvoker.doInvoke(StubInvoker.java:38) at org.apache.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:100) ... 37 more [11:16:12:012] ERROR call.AbstractServerCall: [DUBBO] Process request failed. service=org.apache.dubbo.sample.tri.Greeter method=greetStream, dubbo version: 3.2.0-beta.5, current host: 192.168.1.3, error code: 4-11. This may be caused by , go to https://dubbo.apache.org/faq/4/11 to find instructions. java.lang.NullPointerException: Cannot invoke "org.apache.dubbo.common.stream.StreamObserver.onNext(Object)" because "this.requestObserver" is null at org.apache.dubbo.rpc.protocol.tri.call.BiStreamServerCallListener.onMessage(BiStreamServerCallListener.java:47) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall.onMessage(AbstractServerCall.java:190) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerDecoderListener.onRawMessage(TripleServerStream.java:472) at org.apache.dubbo.rpc.protocol.tri.frame.TriDecoder.processBody(TriDecoder.java:140) at org.apache.dubbo.rpc.protocol.tri.frame.TriDecoder.deliver(TriDecoder.java:87) at org.apache.dubbo.rpc.protocol.tri.frame.TriDecoder.deframe(TriDecoder.java:57) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.doOnData(TripleServerStream.java:438) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.lambda$onData$2(TripleServerStream.java:431) at org.apache.dubbo.common.threadpool.serial.SerializingExecutor.run(SerializingExecutor.java:102) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:833) [11:16:12:012] ERROR serial.SerializingExecutor: [DUBBO] Exception while executing runnable org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver$$Lambda$618/0x000000080148b1a8@3e1ffcc3, dubbo version: 3.2.0-beta.5, current host: 192.168.1.3, error code: 0-19. This may be caused by , go to https://dubbo.apache.org/faq/0/19 to find instructions. java.lang.NullPointerException: Cannot invoke "org.apache.dubbo.common.stream.StreamObserver.onCompleted()" because "this.requestObserver" is null at org.apache.dubbo.rpc.protocol.tri.call.BiStreamServerCallListener.onComplete(BiStreamServerCallListener.java:61) at org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall.onComplete(AbstractServerCall.java:181) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerDecoderListener.close(TripleServerStream.java:477) at org.apache.dubbo.rpc.protocol.tri.frame.TriDecoder.deliver(TriDecoder.java:102) at org.apache.dubbo.rpc.protocol.tri.frame.TriDecoder.close(TriDecoder.java:68) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.doOnData(TripleServerStream.java:440) at org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream$ServerTransportObserver.lambda$onData$2(TripleServerStream.java:431) at org.apache.dubbo.common.threadpool.serial.SerializingExecutor.run(SerializingExecutor.java:102) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:833) ```` 从源码中得知在业务返回`StreamObserver`之前报错导致`BiStreamServerCallListener`没有成功初始化`StreamObserver`，最终在处理end stream后调用onComplete时出现了NPE `org.apache.dubbo.rpc.protocol.tri.call.AbstractServerCall` 源码177行如下： ````java @Override public final void onComplete() { if (listener == null) { // It will enter here when there is an error in the header return; } listener.onComplete(); } ```` -- This is an automated message from the Apache Git Service. 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