title: Jersey client throws javax.ws.rs.ProcessingException: java.net.ConnectException : failed to connect to /127.0.0.1 (port 8080)
body: <p>I am working with an Android jersey client that sends a form to a web-service. I am getting </p>
  
  <blockquote>
    <p>javax.ws.rs.ProcessingException: java.net.ConnectException: failed to
    connect to /127.0.0.1 (port 8080): connect failed: ECONNREFUSED
    (Connection refused)</p>
  </blockquote>
  
  <p>I don't have any proxies configured.
  I can use the web-service via Postman(browser shows it as well).<br>
  The SO posts that I have seen till now all talk about having proxies or the server being inactive, both of which is untrue in my case.<br>
  My android client side code for connecting to the web-service:  </p>
  
  <pre><code>public class SignUpAction implements Runnable {
      private Client client;
      private WebTarget webTarget;
      private Form form;   
      private RegistrationBeanInterface rbI;         
      @Override
      public void run() {
          client = JerseyClientBuilder.newClient();
          try {
              webTarget = client.target(new URI("http://127.0.0.1:8080/WebApp/User/Register"));
              form = new Form();
  
              Response response = webTarget.request(MediaType.APPLICATION_FORM_URLENCODED).post(Entity.form(form)); 
              this.statusCode = response.getStatus();
          } catch (URISyntaxException e) {
              e.getReason();
          }
      }    
      public int getStatusCode(){
          return this.statusCode;
      }
  }
  </code></pre>
  
  <p>And this is how I call the connecting class inside my activity:</p>
  
  <pre><code>signUpAction = signUpAction.createSignUpAction();
  executorService.execute(signUpAction);
  statusCode = signUpAction.getStatusCode();
  if(statusCode == 200){
     Intent intent = new Intent(this, SignInActivity.class);
     startActivity(intent);
  }
  </code></pre>
  
  <p>My Gradle dependency for Jersey </p>
  
  <pre><code>implementation 'org.glassfish.hk2.external:javax.inject:2.4.0-b06'    
  implementation('org.glassfish.jersey.containers:jersey-container-servlet:2.25.1') {
          exclude module : 'javax.inject'
      }
  </code></pre>
  
  <p>This is my stacktrace :</p>
  
  <pre><code>The following warnings have been detected: WARNING: HK2 service reification failed for [org.glassfish.jersey.message.internal.DataSourceProvider] with an exception:
            MultiException stack 1 of 4
            java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: javax.activation.DataSource
                at org.glassfish.hk2.utilities.cache.LRUHybridCache.compute(LRUHybridCache.java:315)
                at org.glassfish.hk2.utilities.reflection.internal.ClassReflectionHelperImpl.getAllMethods(ClassReflectionHelperImpl.java:108)
                at org.jvnet.hk2.internal.Utilities.findInitializerMethods(Utilities.java:1341)
                at org.jvnet.hk2.internal.DefaultClassAnalyzer.getInitializerMethods(DefaultClassAnalyzer.java:107)
                at org.glassfish.jersey.internal.inject.JerseyClassAnalyzer.getInitializerMethods(JerseyClassAnalyzer.java:242)
                at org.jvnet.hk2.internal.Utilities.getInitMethods(Utilities.java:218)
                at org.jvnet.hk2.internal.ClazzCreator.initialize(ClazzCreator.java:145)
                at org.jvnet.hk2.internal.ClazzCreator.initialize(ClazzCreator.java:180)
                at org.jvnet.hk2.internal.SystemDescriptor.internalReify(SystemDescriptor.java:740)
                at org.jvnet.hk2.internal.SystemDescriptor.reify(SystemDescriptor.java:694)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.reifyDescriptor(ServiceLocatorImpl.java:461)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.narrow(ServiceLocatorImpl.java:2288)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.access$1200(ServiceLocatorImpl.java:125)
                at org.jvnet.hk2.internal.ServiceLocatorImpl$9.compute(ServiceLocatorImpl.java:1373)
                at org.jvnet.hk2.internal.ServiceLocatorImpl$9.compute(ServiceLocatorImpl.java:1368)
                at org.glassfish.hk2.utilities.cache.internal.WeakCARCacheImpl.compute(WeakCARCacheImpl.java:116)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetAllServiceHandles(ServiceLocatorImpl.java:1430)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.getAllServiceHandles(ServiceLocatorImpl.java:1355)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.getAllServiceHandles(ServiceLocatorImpl.java:1344)
                at org.glassfish.jersey.internal.inject.Providers.getServiceHandles(Providers.java:354)
                at org.glassfish.jersey.internal.inject.Providers.getCustomProviders(Providers.java:201)
                at org.glassfish.jersey.message.internal.MessageBodyFactory.&lt;init&gt;(MessageBodyFactory.java:221)
                at java.lang.reflect.Constructor.newInstance(Native Method)
                at org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1375)
                at org.jvnet.hk2.internal.ClazzCreator.createMe(ClazzCreator.java:272)
                at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:366)
                at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:487)
                at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:83)
                at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:71)
                at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture$1.call(Cache.java:97)
                at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture.run(Cache.java:154)
                at org.glassfish.hk2.utilities.cache.Cache.compute(Cache.java:199)
                at org.jvnet.hk2.internal.SingletonContext.findOrCreate(SingletonContext.java:122)
                at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2022)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:774)
                at org.jvnet.hk2.internal.ServiceLocatorImpl.getUnqualifiedService(ServiceLocatorImpl.java:786)
                at org.jvnet.hk2.internal.IterableProviderImpl.get(IterableProviderImpl.java:111)
                at org.glassfish.jersey.client.RequestProcessingInitializationStage.apply(RequestProcessingInitializationStage.java:97)
                at org.glassfish.jersey.client.RequestProcessingInitializationStage.apply(RequestProcessingInitializationStage.java:67)
                at org.glassfish.jersey.process.internal.Stages$LinkedStage.apply(Stages.java:308)
                at org.glassfish.jersey.process.internal.Stages.process(Stages.java:171)
              at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:25
  E/AndroidRuntime: FATAL EXCEPTION: pool-1-thread-1
                    Process: com.stuff.echo01.dummypracticeapplication_01_09_2018, PID: 3677
                    javax.ws.rs.ProcessingException: java.net.ConnectException: failed to connect to /127.0.0.1 (port 8080): connect failed: ECONNREFUSED (Connection refused)
                        at org.glassfish.jersey.client.internal.HttpUrlConnector.apply(HttpUrlConnector.java:287)
                        at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:252)
                        at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:684)
                        at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:681)
                        at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
                        at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
                        at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
                        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:444)
                        at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:681)
                        at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:437)
                        at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:343)
                        at com.stuff.echo01.dummypracticeapplication_01_09_2018.authpackage.SignUpAction.run(SignUpAction.java:90)
                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                        at java.lang.Thread.run(Thread.java:818)
                     Caused by: java.net.ConnectException: failed to connect to /127.0.0.1 (port 8080): connect failed: ECONNREFUSED (Connection refused)
                        at libcore.io.IoBridge.connect(IoBridge.java:124)
                        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
                        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:452)
                        at java.net.Socket.connect(Socket.java:884)
                        at com.android.okhttp.internal.Platform.connectSocket(Platform.java:117)
                        at com.android.okhttp.internal.http.SocketConnector.connectRawSocket(SocketConnector.java:160)
                        at com.android.okhttp.internal.http.SocketConnector.connectCleartext(SocketConnector.java:67)
                        at com.android.okhttp.Connection.connect(Connection.java:152)
                        at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:185)
                        at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:128)
                        at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:341)
                        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330)
                        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248)
                        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:433)
                        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114)
                        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:245)
                        at com.android.tools.profiler.support.network.httpurl.TrackedHttpURLConnection.getOutputStream(TrackedHttpURLConnection.java:288)
                        at com.android.tools.profiler.support.network.httpurl.HttpURLConnection$.getOutputStream(HttpURLConnection$.java:212)
                        at org.glassfish.jersey.client.internal.HttpUrlConnector$4.getOutputStream(HttpUrlConnector.java:390)
                        at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:200)
                        at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:194)
                        at org.glassfish.jersey.message.internal.CommittingOutputStream.write(CommittingOutputStream.java:228)
                        at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$UnCloseableOutputStream.write(WriterInterceptorExecutor.java:299)
                        at java.io.OutputStreamWriter.flushBytes(OutputStreamWriter.java:170)
                        at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:161)
                        at org.glassfish.jersey.message.internal.ReaderWriter.writeToAsString(ReaderWriter.java:193)
                        at org.glassfish.jersey.message.internal.AbstractMessageReaderWriterProvider.writeToAsString(AbstractMessageReaderWriterProvider.java:130)
                      at org.glassfish.jersey.messag  
  </code></pre>