Balancer shutdown, AS:OutOfMemoryError: unable to create new native thread

1. start Apache HTTP Server with mod_cluster
2. start EAP 6.3 worker 1, jvmroute: jboss-eap-6.3
3. start EAP 6.3 worker 2, jvmroute: jboss-eap-6.3-2
4. stop 1.
5. let 2. and 3. trying to contact the balancer
6. OOM

See two detailed logs for both machines: OOM-server.logs.zip.

At the moment, I'm not sure it was really mod_cluster's fault, due to the JGroups messages. I have a hunch it might be linked to the new JBossWeb NIO...

Assigning to myself for investigation.