ERROR [org.wildfly.httpclient.common] [] WFHTTP000006: Failed to write exception: java.lang.IllegalStateException: UT000002: The response has already been started
	at io.undertow.core@2.0.30.SP4-redhat-00001//io.undertow.server.HttpServerExchange.setStatusCode(HttpServerExchange.java:1406)
	at org.wildfly.http-client.common@1.0.22.Final-redhat-00001//org.wildfly.httpclient.common.HttpServerHelper.sendException(HttpServerHelper.java:45)
	at org.wildfly.http-client.ejb@1.0.22.Final-redhat-00001//org.wildfly.httpclient.ejb.HttpInvocationHandler.writeException(HttpInvocationHandler.java:270)
	at org.jboss.as.ejb3@7.2.9.GA-redhat-00003//org.jboss.as.ejb3.remote.AssociationImpl.receiveInvocationRequest(AssociationImpl.java:138)
	at org.wildfly.http-client.ejb@1.0.22.Final-redhat-00001//org.wildfly.httpclient.ejb.HttpInvocationHandler.lambda$handleInternal(HttpInvocationHandler.java:135)
	at org.jboss.threads@2.3.3.Final-redhat-00001//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads@2.3.3.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
	at org.jboss.threads@2.3.3.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
	at org.jboss.threads@2.3.3.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
	at java.base/java.lang.Thread.run(Thread.java:834)

 43     public static void sendException(HttpServerExchange exchange, int status, Throwable e) {
 44         try {
 45             exchange.setStatusCode(status);
 46             exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "application/x-wf-jbmar-exception;version=1");
 47             final MarshallingConfiguration marshallingConfiguration = new MarshallingConfiguration();
 48             marshallingConfiguration.setVersion(2);
 49             final Marshaller marshaller = RIVER_MARSHALLER_FACTORY.createMarshaller(marshallingConfiguration);
 50             OutputStream outputStream = exchange.getOutputStream();
 51             final ByteOutput byteOutput = Marshalling.createByteOutput(outputStream);
 52             // start the marshaller
 53             marshaller.start(byteOutput);
 54             marshaller.writeObject(e);
 55             marshaller.write(0);
 56             marshaller.finish();
 57             marshaller.flush();
 58             exchange.endExchange();
 59         } catch (Exception ex) {
 60             HttpClientMessages.MESSAGES.failedToWriteException(ex);
 61             exchange.endExchange();
 62         }
 63     }

135         try {
136             requestContent = invocationRequest.getRequestContent(classLoader);
137         } catch (IOException | ClassNotFoundException e) {
138             invocationRequest.writeException(new EJBException(e));
139             return CancelHandle.NULL;
140         } finally {
141             WildFlySecurityManager.setCurrentContextClassLoaderPrivileged(originalTccl);
142         }

265                 @Override
266                 public void writeException(@NotNull Exception exception) {
267                     if(identifier != null) {
268                         cancellationFlags.remove(identifier);
269                     }
270                     HttpServerHelper.sendException(exchange, StatusCodes.INTERNAL_SERVER_ERROR, exception);
271                 }

1400     public HttpServerExchange setStatusCode(final int statusCode) {
1401         if (statusCode < 0 || statusCode > 999) {
1402             throw new IllegalArgumentException("Invalid response code");
1403         }
1404         int oldVal = state;
1405         if (allAreSet(oldVal, FLAG_RESPONSE_SENT)) {
1406             throw UndertowMessages.MESSAGES.responseAlreadyStarted();
1407         }