ClassCastException upon trying to invoke asynchronous method in bean running in EAP7.1 from 7.0 legacy EJB client ----------------------------------------------------------------------------------------------------------------- Key: WFLY-8481 URL: https://issues.jboss.org/browse/WFLY-8481 Project: WildFly Issue Type: Bug Components: EJB Reporter: Stuart Douglas Assignee: Stuart Douglas Priority: Critical Upon asynchronous call from 7.0 client to bean deployed on 7.1 server, the following exception is produced: {code}Mar 17, 2017 7:25:36 AM org.jboss.as.quickstarts.ejb.asynchronous.client.AsynchronousClient fireAndForget INFO: The server log should contain a message at (about) Fri Mar 17 07:25:51 UTC 2017, indicating that the call to the asynchronous bean completed. Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.util.concurrent.Future at com.sun.proxy.$Proxy0.longerRunning(Unknown Source) at org.jboss.as.quickstarts.ejb.asynchronous.client.AsynchronousClient.getResultAsync(AsynchronousClient.java:88) at org.jboss.as.quickstarts.ejb.asynchronous.client.AsynchronousClient.main(AsynchronousClient.java:159){code}