title: Cannot access REST endpoint in docker container from another docker container
body: <p>I have 2 microservices, each one deployed in its own docker container.
  I use docker compose in order to deploy them and make microservice1 aware of microservice2. Each one is build in its own maven project.</p>
  
  <p>Both microservices are deployed successfully, the docker containers are created and started and I can access each base root endpoint.</p>
  
  <p><strong><em>The issue is that from microservice1, I want to access trough /remote url the base root from microservice2. This does not work and I get 404 when the call reaches the REST client that makes the get call to microservice2 which is in the <code>remote()</code> method bellow, see bold, see <a href="http://#stacktrace" rel="nofollow noreferrer">stacktrace</a> bellow.</em></strong></p>
  
  <p><strong>microservice1</strong> exposes 2 REST endpoints:</p>
  
  <ol>
  <li>at root path for get request;</li>
  <li>at /remote for get request.</li>
  </ol>
  
  <p><code>
  @RequestMapping("/")
  public String home() {
      System.out.println("Hello Docker World " + 1);
      return "Hello Docker World " + 1;
  }
  </code></p>
  
  <p><code>
  @GetMapping("/remote")
  public String remote() {
      RestTemplate restTemplate = new RestTemplate();
      <strong>return restTemplate.getForObject("<a href="http://localhost:8080/maven-app2/" rel="nofollow noreferrer">http://localhost:8080/maven-app2/</a>", String.class);</strong>
  }
  </code></p>
  
  <p><strong>microservice2</strong> exposes 1 REST endpoint:</p>
  
  <ol>
  <li>at root path for get request:</li>
  </ol>
  
  <p><code>
  @GetMapping("/")
  public String home() {
      System.out.println("Hello Docker World " + 2);
      return "Hello Docker World " + 2;
  }
  </code></p>
  
  <p><strong>Dockerfile for microservice1</strong></p>
  
  <pre><code>   FROM openjdk:8-jdk-alpine
     VOLUME /tmp
     ARG DEPENDENCY=target/dependency
     COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
     COPY ${DEPENDENCY}/META-INF /app/META-INF
     COPY ${DEPENDENCY}/BOOT-INF/classes /app
     ENTRYPOINT ["java","-cp","app:app/lib/*","com.mhp.App"]
  </code></pre>
  
  <p><strong>Dockerfile for microservice2</strong></p>
  
  <pre><code>   FROM openjdk:8-jdk-alpine
     VOLUME /tmp
     ARG DEPENDENCY=target/dependency
     COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
     COPY ${DEPENDENCY}/META-INF /app/META-INF
     COPY ${DEPENDENCY}/BOOT-INF/classes /app
     ENTRYPOINT ["java","-cp","app:app/lib/*","com.mhp.App"]
  </code></pre>
  
  <p><strong>docker-compose</strong> file in microservice1:</p>
  
  <pre><code>version: "2"
  services:
    microservice2:
      image: microsdocker2/maven-app2:latest
      expose:
        - 8080
      ports:
        - 0.0.0.0:8080:8080/tcp
  
    microservice1:
      image: microsdocker1/maven-app1:latest
      ports:
        - 0.0.0.0:8090:8080/tcp
      depends_on:
        - microservice2
      links:
        - microservice2
  </code></pre>
  
  <p>after building and installing each image I execute the <code>docker-compose up</code> and I get both applications deployed successfully and I can access the base root endpoint of each microservice.</p>
  
  <pre><code>...
      microservice1_1_2f0ac966a94e | 2018-11-26 14:26:08.955  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '/maven-app1'
      microservice1_1_2f0ac966a94e | 2018-11-26 14:26:08.960  INFO 1 --- [           main] com.mhp.App                              : Started App in 6.63 seconds (JVM running for 7.358)
  
  
  ...
      microservice2_1_fa2376655f8c | 2018-11-26 14:26:08.090  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '/maven-app2'
      microservice2_1_fa2376655f8c | 2018-11-26 14:26:08.101  INFO 1 --- [           main] com.mhp.App                              : Started App in 6.821 seconds (JVM running for 7.75)
  </code></pre>
  
  <p> stacktrace :</p>
  
  <pre><code> microservice1_1_2f0ac966a94e | 2018-11-27 08:39:33.720 ERROR 1 --- [nio-8080-exec-4] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [/maven-app1] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException: 404 null] with root cause
  microservice1_1_2f0ac966a94e |
  microservice1_1_2f0ac966a94e | org.springframework.web.client.HttpClientErrorException: 404 null
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:94) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:79) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:730) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:688) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:644) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:296) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  </code></pre>
  
  <blockquote>
    <p>microservice1_1_2f0ac966a94e |  at com.mhp.App.remote(App.java:29)
    ~[app/:na]</p>
  </blockquote>
  
  <pre><code>microservice1_1_2f0ac966a94e |  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:891) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) ~[spring-webmvc-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
  microservice1_1_2f0ac966a94e |  at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.34.jar:8.5.34]
  microservice1_1_2f0ac966a94e |  at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
  </code></pre>
  
  <p>versions:</p>
  
  <pre><code>spring-boot version 2.0.5.RELEASE
  docker version 18.09.0
  docker compose version 1.23.1 
  </code></pre>