User gets 400 when EAP6 shuts down in cluster using mod_cluster load balancing

Solution Unverified - Updated -

Issue

User gets a 400 error page when accessing a clustered application.
We have two application servers in the cluster, using mod_cluster. When we shut down one application server, the user sometimes experiences a 400 before they are re-routed to the other application server. We have sticky session set to true.

Environment

  • JBoss Enterprise Web Server (EWS) 2.0
    • Apache HTTPD
  • JBoss Enterprise Application Platform (EAP) 6.x

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