Hi. I'm experiencing the same exception and was wondering if you ever got to resolve this?
I have a domain + Apache + Modcluster with several hosts. I started getting this error the moment I refactored some slow processes to run asynchronously as opposed to their former synchronous architecture by using the @asynchronous annotation. I'm guessing Wildfly is spinning quite a huge number of threads to cater for the number of jobs being produced and is somehow causing the send status of the node to timeout.