They say that an invalid/unregistered event has been detected. Both have to do with the Application.cfc framework methods/event handlers that are defined in the coldbox.xml.cfm config.
It all seems related to BD. It seems that the JVM is out of memory for creating new threads. I am not familiar, with BD that much to know how many threads you can create.
What I went ahead and did was removed all the lines for cfthread in MTlogger.cfc and MTcachemanager.cfc and reinitialized and it all seems to work now (at least its been running for a few hours now).
I posted to the BD list and hopefully they will check into it.