两个服务之间通过http方式调用接口，出现下列错误。
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "url": Unexpected end of file from server; nested exception is java.net.SocketException: Unexpected end of file from server
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:732) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:680) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:466) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at cn.zenki.lingjian.service.impl.OnlineTaskManagerServiceImpl.serviceInvocation(OnlineTaskManagerServiceImpl.java:429) ~[classes!/:0.0.1-SNAPSHOT]
at cn.zenki.lingjian.service.AsyncService.runPipeline(AsyncService.java:164) ~[classes!/:0.0.1-SNAPSHOT]
at cn.zenki.lingjian.service.AsyncService.newThread(AsyncService.java:77) ~[classes!/:0.0.1-SNAPSHOT]
at cn.zenki.lingjian.service.AsyncService$$FastClassBySpringCGLIB$$d223952e.invoke(<generated>) ~[classes!/:0.0.1-SNAPSHOT]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746) ~[spring-aop-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115) ~[spring-aop-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:851) ~[?:1.8.0_212]
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678) ~[?:1.8.0_212]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1587) ~[?:1.8.0_212]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492) ~[?:1.8.0_212]
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) ~[?:1.8.0_212]
at org.springframework.http.client.SimpleClientHttpResponse.getRawStatusCode(SimpleClientHttpResponse.java:55) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.web.client.DefaultResponseErrorHandler.hasError(DefaultResponseErrorHandler.java:51) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:754) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:724) ~[spring-web-5.0.7.RELEASE.jar!/:5.0.7.RELEASE]
... 12 more
这问题咱也没见过，第一次见，搜索一番发现大概意思是你调用的服务接受了这个请求，但是没有给你响应，或者响应中断了，确定了是服务提供者的问题，将问题抛出排查，果然有问题，在此记录一下。
