Our studio is experiencing the same issue described in this old thread. In our case it’s intermittently crashing Nuke 11.3 on Centos 7. Best I can tell the issue seems to be related to the way the submission script is submitting each job in its own thread (as hinted by @eamsler) above. In an effort to isolated the problem, we tested a hacked copy (not in production) of the submission script which strips out all multithreading and runs submissions in the main nuke thread and we’ve not been able to repro the crash with the change.