最近做在一个微服务架构的毕业设计，通过zuul网关访问服务时，发现有时会报出以下错误:
Error during filtering
com.netflix.zuul.exception.ZuulException: Filter threw Exception
at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:227) ~[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.postRoute(FilterProcessor.java:92) ~[zuul-core-1.3.1.jar:1.3.1]
at com.netflix.zuul.ZuulRunner.postRoute(ZuulRunner.java:87) ~[zuul-core-1.3.1.jar:1.3.1]
at com.netflix.zuul.http.ZuulServlet.postRoute(ZuulServlet.java:107) ~[zuul-core-1.3.1.jar:1.3.1]
at com.netflix.zuul.http.ZuulServlet.service(ZuulServlet.java:88) ~[zuul-core-1.3.1.jar:1.3.1]
at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:165) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.cloud.netflix.zuul.web.ZuulController.handleRequest(ZuulController.java:44) [spring-cloud-netflix-zuul-2.0.0.M8.jar:2.0.0.M8]
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158) [spring-boot-actuator-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126) [spring-boot-actuator-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111) [spring-boot-actuator-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:84) [spring-boot-actuator-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.29.jar:8.5.29]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_171]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_171]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.29.jar:8.5.29]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_171]
Caused by: java.lang.reflect.UndeclaredThrowableException: null
at org.springframework.util.ReflectionUtils.rethrowRuntimeException(ReflectionUtils.java:327) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.run(SendResponseFilter.java:108) ~[spring-cloud-netflix-zuul-2.0.0.M8.jar:2.0.0.M8]
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]
... 62 common frames omitted
Caused by: org.apache.catalina.connector.ClientAbortException: java.io.IOException: 您的主机中的软件中止了一个已建立的连接。
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:356) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:815) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:720) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:391) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:369) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.writeResponse(SendResponseFilter.java:219) ~[spring-cloud-netflix-zuul-2.0.0.M8.jar:2.0.0.M8]
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.writeResponse(SendResponseFilter.java:176) ~[spring-cloud-netflix-zuul-2.0.0.M8.jar:2.0.0.M8]
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.run(SendResponseFilter.java:105) ~[spring-cloud-netflix-zuul-2.0.0.M8.jar:2.0.0.M8]
... 64 common frames omitted
Caused by: java.io.IOException: 您的主机中的软件中止了一个已建立的连接。
at sun.nio.ch.SocketDispatcher.write0(Native Method) ~[na:1.8.0_171]
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51) ~[na:1.8.0_171]
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93) ~[na:1.8.0_171]
at sun.nio.ch.IOUtil.write(IOUtil.java:65) ~[na:1.8.0_171]
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471) ~[na:1.8.0_171]
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1267) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:670) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.SocketWrapperBase.writeBlocking(SocketWrapperBase.java:450) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:388) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.doWrite(Http11OutputBuffer.java:623) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:123) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:225) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.Response.doWrite(Response.java:541) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:351) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
... 72 common frames omitted
不通过zuul网关访问该服务时，发现并不会报出该错误
image.png
由此可见并不是后台代码的问题，之后又发现对于那些数据了比较小，响应速度比较快的请求，很少报出该错误，经过各种排查后，怀疑可能是熔断器问题，当请求响应时间过长，触发了熔断器，所以导致了请求失败。
修改zuul网关服务的配置文件，添加一下信息:
时间根据具体情况修改
ribbon:
ReadTimeout: 60000
ConnectTimeout: 60000
hystrix:
command:
default:
execution:
isolation:
thread:
timeoutInMilliseconds: 60000
多次请求都成功了
image.png