We take the ejb-remote project from wildfly quick-starts github site to make a test showcase.  We make two additions to these projects:     1.- On the server side in CalculatorBean class we add a "send" method with a single byte array parameter     2.- On the client side in RemoteEJBClient class we add 20 invocations to that method "send" stoping when an exception occurs  At last we create a .bat file to execute the client side of the quick start to reproduce the issue The test show case is packaged in client-side.zip. Inside logs.zip attachment you can find client.log, java0.log.0 and NGINX.json to see ours results. java0.log.0 is the client result of java logging with FINEST level. NGINX.json is the log of the 408 NGINX response code status. The sources are inside sources.zip: ejb-remote-client-sources.jar and ejb-remote-server-side-sources.jar The deployment of the beans are in server-side.zip Steps to reproduce:     1.- Unzip the client-side.zip     2.- set the JAVA_HOME environment variable      3.- run the script from the step 1, client/ejb-remote-client-test.bat to reproduce the issue The result of step 3 shows that the calls of quick starts to RemoteCalculator goes well but when the calls of the remote method "send" at the tenth try, after 60088 milliseconds, the issue occurs. This is the output: nov. 13, 2023 5:46:52 P.áM. org.wildfly.naming.client.Version <clinit> INFO: WildFly Naming version 2.0.1.Final nov. 13, 2023 5:46:52 P.áM. org.wildfly.security.Version <clinit> INFO: ELY00001: WildFly Elytron version 2.2.2.Final nov. 13, 2023 5:46:52 P.áM. org.jboss.ejb.client.EJBClient <clinit> INFO: JBoss EJB Client version 5.0.5.Final Obtained a remote stateless calculator for invocation Adding 204 and 340 via the remote stateless calculator deployed on the server nov. 13, 2023 5:46:53 P.áM. org.xnio.Xnio <clinit> INFO: XNIO version 3.8.11.Final nov. 13, 2023 5:46:53 P.áM. org.xnio.nio.NioXnio <clinit> INFO: XNIO NIO Implementation Version 3.8.11.Final nov. 13, 2023 5:46:53 P.áM. org.jboss.threads.Version <clinit> INFO: JBoss Threads version 2.4.0.Final nov. 13, 2023 5:46:53 P.áM. org.jboss.remoting3.EndpointImpl <clinit> INFO: JBoss Remoting version 5.0.27.Final Remote calculator returned sum = 544 Subtracting 2332 from 3434 via the remote stateless calculator deployed on the server Remote calculator returned difference = 1102 Obtained a remote stateful counter for invocation Counter will now be incremented 5 times Incrementing counter Count after increment is 1 Incrementing counter Count after increment is 2 Incrementing counter Count after increment is 3 Incrementing counter Count after increment is 4 Incrementing counter Count after increment is 5 Counter will now be decremented 5 times Decrementing counter Count after decrement is 4 Decrementing counter Count after decrement is 3 Decrementing counter Count after decrement is 2 Decrementing counter Count after decrement is 1 Decrementing counter Count after decrement is 0 sending 61564 bytes...OK sending 61664 bytes...OK sending 61764 bytes...OK sending 61864 bytes...OK sending 61964 bytes...OK sending 62064 bytes...OK sending 62164 bytes...OK sending 62264 bytes...OK sending 62364 bytes...OK sending 62464 bytes...jakarta.ejb.EJBException: java.io.IOException: UT001000: Connection closed         at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:212)         at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:116)         at jdk.proxy1/jdk.proxy1.$Proxy0.send(Unknown Source)         at org.jboss.as.quickstarts.ejb.remote.client.RemoteEJBClient.sendBytes(RemoteEJBClient.java:64)         at org.jboss.as.quickstarts.ejb.remote.client.RemoteEJBClient.main(RemoteEJBClient.java:47) Caused by: java.io.IOException: UT001000: Connection closed         at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:600)         at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:535)         at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)         at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)         at io.undertow.protocols.ssl.SslConduit$SslReadReadyHandler.readReady(SslConduit.java:1279)         at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)         at org.xnio.nio.WorkerThread.run(WorkerThread.java:603) ERROR - delay [60088] - error [java.io.IOException: UT001000: Connection closed] END