This issue is directly related to https://issues.jboss.org/browse/AS7-2724, where signed jars are sometimes throwing a security exception when the server starts up and then classes cannot be loaded out of certain packages (appears to be some sort of a concurrency issue).

The fix for that issue was applied to JarFileResourceLoader here: https://github.com/jboss-modules/jboss-modules/commit/8cf33f5c02c0c4bf6f96d04efa8845762bbc90ae

However, our application is exploded, so the VFSResourceLoader needs a similar fix. I will attach a git patch file with the change we're proposing.

To test the theory, we applied the patch to one server and left another as is as a control...we then left a process running that continually restarted the server for 3 days. The control server hit the SecurityException problem 5 times, and the patched server didn't show it at all.