Through some extensive troubleshooting with the Development team we found that the Javelin was crashing when the flow log was locked by some other application.
Release : 4.7
Component : CA Test Data Manager and Javelin
To handle this Engineering updated the Javelin code so the flow now waits for 1/2 second when the log file is locked by another application, and it will let Javelin crash only after waiting for 100 times consecutively.
This change is found in Javelin-2.0.713.0. Contact Support for a copy of this Javelin relase, if needed.