title: Resteasy Client keeping connection allocated after a method throws an Exception
body: <p>I'm currently using TJWSEmbeddedJaxrsServer to help me with my RESTful API tests (created with Resteasy) and it works sweetly.
  But a problem happens when any of the called methods throws an Exception: the Reasteasy Client becomes "lost" and still holds the connection, not allowing for the other test methods to call the RESTful service. It happens even if you instanciate a Provider that can Unwrap the Exception and use it in the embedded server.</p>
  
  <p>Can anyone help me, please?</p>
  
  <p>To simulate the problem, it's actually easy:</p>
  
  <ol>
  <li>Download the sample provided by Mark Paluch in <a href="https://github.com/mp911de/rest-api-test" rel="nofollow">https://github.com/mp911de/rest-api-test</a></li>
  <li>Change the test class to be like this:</li>
  </ol>
  
  <p>public class InMemoryRestTest {</p>
  
  <pre><code>@Path("/myresource")
  public static class MyResource {
  
      @POST
      @Consumes(MediaType.TEXT_PLAIN)
      @Produces(MediaType.APPLICATION_XML)
      public MyModel createMyModel(int number) throws Exception {
          // supose this is a Business exception
          throw new Exception("Test");
      }
  
  }
  
  public static MyResource sut = new MyResource();
  public static InMemoryRestServer server;
  
  @BeforeClass
  public static void beforeClass() throws Exception {
      server = InMemoryRestServer.create(sut);
  }
  
  @AfterClass
  public static void afterClass() throws Exception {
      server.close();
  }
  
  @Test
  public void postSimpleBody() throws Exception {
      // This one throws the "Exception" exception and passes     
      Response response = server.newRequest("/myresource").request().buildPost(Entity.text("42")).invoke();
      assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), response.getStatus());
  }
  
  @Test
  public void postAnother() throws Exception {
      // This one fails with "Invalid use of BasicClientConnManager: connection still allocated."
      Response response = server.newRequest("/myresource").request().buildPost(Entity.text("20")).invoke();
      assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), response.getStatus());
  }
  </code></pre>
  
  <p>}</p>
  
  <p>And voilla! When the tests for "postAnother()" run, the following error will occur:</p>
  
  <pre><code>javax.ws.rs.ProcessingException: Unable to invoke request
      at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:287)
      at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:407)
      at biz.paluch.rest.test.InMemoryRestTest.postSimpleBody(InMemoryRestTest.java:51)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
      at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
  Caused by: java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated.
  Make sure to release the connection before allocating another one.
      at org.apache.http.impl.conn.BasicClientConnectionManager.getConnection(BasicClientConnectionManager.java:162)
      at org.apache.http.impl.conn.BasicClientConnectionManager$1.getConnection(BasicClientConnectionManager.java:139)
      at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:456)
      at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
      at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
      at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:283)
      ... 27 more
  </code></pre>