尝试使用Jersey客户端API进行POST请求的“已连接”异常

我正在使用arquillian为部署在Tomcat 8上的JAX-RS / Jersey Web服务创建集成测试。

我正在尝试这样的POST请求：

E dummy = dummyFactory.manufacturePojo(getSubClassType());
dummy.setId(null);

Client client = ClientBuilder.newClient();
WebTarget target = client.target(BASE_URI).path("bandeira");

Response response = target.request(MediaType.APPLICATION_JSON)
            .header(HttpHeaders.AUTHORIZATION, CHAVE_TESTE)
            .header(HttpHeaders.CONTENT_TYPE, "application/json")
            .post(Entity.entity(dummy, MediaType.APPLICATION_JSON));

当我这样做时，会出现以下异常：

Caused by: java.lang.IllegalStateException: Already connected
at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3000)
at org.glassfish.jersey.client.HttpUrlConnector.setOutboundHeaders(HttpUrlConnector.java:364)
at org.glassfish.jersey.client.HttpUrlConnector.access$100(HttpUrlConnector.java:91)
at org.glassfish.jersey.client.HttpUrlConnector$4.getOutputStream(HttpUrlConnector.java:327)
at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:201)
at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:195)
at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:263)
at org.glassfish.jersey.message.internal.OutboundMessageContext.commitStream(OutboundMessageContext.java:816)
at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:546)
at org.glassfish.jersey.client.HttpUrlConnector._apply(HttpUrlConnector.java:331)
at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:243)
at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:246)
... 149 more

我可以使用启发式方法，因为我仍在学习Arquillian和Jersey客户端API :)谢谢