使用zuul做服务网关抛出异常：com.netflix.zuul.exception.ZuulException: Forwarding error

朴灿烈づ我的快乐病毒、 2022-05-18 09:25 278阅读 0赞

# 异常信息 #

在学习使用zuul做服务时，访问服务一直抛出以下异常 服务为空com.netflix.client.ClientException: null

com.netflix.zuul.exception.ZuulException: Forwarding error
        at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.handleException(RibbonRoutingFilter.java:188) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.forward(RibbonRoutingFilter.java:163) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.run(RibbonRoutingFilter.java:111) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at com.netflix.zuul.ZuulFilter.runFilter(ZuulFilter.java:117) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:193) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.FilterProcessor.runFilters(FilterProcessor.java:157) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.FilterProcessor.route(FilterProcessor.java:118) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.ZuulRunner.route(ZuulRunner.java:96) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.http.ZuulServlet.route(ZuulServlet.java:116) ~[zuul-core-1.3.1.jar:1.3.1]
        at com.netflix.zuul.http.ZuulServlet.service(ZuulServlet.java:81) ~[zuul-core-1.3.1.jar:1.3.1]
        at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:157) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.cloud.netflix.zuul.web.ZuulController.handleRequest(ZuulController.java:44) [spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) [spring-boot-1.5.16.BUILD-20180730.174144-2.jar:1.5.16.BUILD-SNAPSHOT]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111) [spring-boot-actuator-1.5.16.BUILD-20180730.174144-2.jar:1.5.16.BUILD-SNAPSHOT]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:103) [spring-boot-actuator-1.5.16.BUILD-20180730.174144-2.jar:1.5.16.BUILD-SNAPSHOT]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.32.jar:8.5.32]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
    Caused by: com.netflix.client.ClientException: null
        at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:118) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.run(AbstractRibbonCommand.java:187) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.run(AbstractRibbonCommand.java:52) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302) ~[hystrix-core-1.5.12.jar:1.5.12]
        at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298) ~[hystrix-core-1.5.12.jar:1.5.12]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.subscribe(Observable.java:10247) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.subscribe(Observable.java:10214) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.BlockingOperatorToFuture.toFuture(BlockingOperatorToFuture.java:51) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.observables.BlockingObservable.toFuture(BlockingObservable.java:411) ~[rxjava-1.2.0.jar:1.2.0]
        at com.netflix.hystrix.HystrixCommand.queue(HystrixCommand.java:378) ~[hystrix-core-1.5.12.jar:1.5.12]
        at com.netflix.hystrix.HystrixCommand.execute(HystrixCommand.java:344) ~[hystrix-core-1.5.12.jar:1.5.12]
        at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.forward(RibbonRoutingFilter.java:158) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        ... 67 common frames omitted
    Caused by: java.lang.RuntimeException: java.net.SocketTimeoutException: Read timed out
        at rx.exceptions.Exceptions.propagate(Exceptions.java:58) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:464) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.observables.BlockingObservable.single(BlockingObservable.java:341) ~[rxjava-1.2.0.jar:1.2.0]
        at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:112) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        ... 129 common frames omitted
    Caused by: java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_121]
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[na:1.8.0_121]
        at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[na:1.8.0_121]
        at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[na:1.8.0_121]
        at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:282) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:165) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.10.jar:4.4.10]
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.6.jar:4.5.6]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[httpclient-4.5.6.jar:4.5.6]
        at org.springframework.cloud.netflix.ribbon.apache.RibbonLoadBalancingHttpClient.execute(RibbonLoadBalancingHttpClient.java:82) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at org.springframework.cloud.netflix.ribbon.apache.RibbonLoadBalancingHttpClient.execute(RibbonLoadBalancingHttpClient.java:42) ~[spring-cloud-netflix-core-1.4.6.BUILD-20180801.084130-247.jar:1.4.6.BUILD-SNAPSHOT]
        at com.netflix.client.AbstractLoadBalancerAwareClient$1.call(AbstractLoadBalancerAwareClient.java:104) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:303) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:287) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:231) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:228) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:286) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onNext(OnSubscribeConcatMap.java:144) ~[rxjava-1.2.0.jar:1.2.0]
        at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:185) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Subscriber.setProducer(Subscriber.java:209) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.subscribe(Observable.java:10247) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.Observable.subscribe(Observable.java:10214) ~[rxjava-1.2.0.jar:1.2.0]
        at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:444) ~[rxjava-1.2.0.jar:1.2.0]
        ... 131 common frames omitted

# 解决方法 #

在学习Hystrix时，为了实现服务降级及断路器的效果，在eureka-client服务提供者的代码中添加了线程睡眠模拟访问延迟，这个原因导致了服务调用失败，解决方法去掉线程睡眠或者配置超时时间  
![这里写图片描述][20180801205926860]

配置超时时间在zuul的项目中配置  
![这里写图片描述][20180801210059185]

参考：[https://blog.csdn.net/heroguo007/article/details/78134678][https_blog.csdn.net_heroguo007_article_details_78134678]

[20180801205926860]: /images/20220518/407ee0fe03334115bdc35dffab2169ca.png
[20180801210059185]: /images/20220518/8f68dec8ebc54ded8156788339cc2cce.png
[https_blog.csdn.net_heroguo007_article_details_78134678]: https://blog.csdn.net/heroguo007/article/details/78134678