JBoss EAP 7 fails to connect to Apache httpd/mod_cluster due to a bad source port caused by port-offset

Solution Verified - Updated -

Issue

  • JBoss fails to connect to Apache httpd/mod_cluster due to permissions issues like the following:

    ERROR [org.jboss.modcluster] (UndertowEventHandlerAdapter - 1) MODCLUSTER000043: Failed to send INFO command to 127.0.0.1/127.0.0.1:6666: Permission denied (Bind failed)

    It starts successfully as root

  • JBoss fails to connect to Apache httpd/mod_cluster due to "java.net.ConnectException: Cannot assign requested address (connect failed)" like the following:

    ERROR [org.jboss.modcluster] (UndertowEventHandlerAdapter - 1) MODCLUSTER000043: Failed to send STATUS command to 127.0.0.1/127.0.0.1:6666: Cannot assign requested address

    I suspected ephemeral port exhaustion but I could not see such exhaustion from netstat output.

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7.x
  • mod_cluster

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