panic: sleeping thread

Paul Halliday paul.halliday at
Mon Mar 22 12:28:25 UTC 2010

I have a couple VM's that randomly halt with this error:

Sleeping thread (tid 10018, pid 1058) owns a non-sleepable lock
panic: sleeping thread
cpuid = 0
Uptime 11h14m31s
Cannot dump. Device not defined or unavailable.

FreeBSD 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08 UTC
2009     root at

These systems run nightly Nessus scans and these halts are very
sporadic; I can go a week w/o seeing one.

What should I do to start to troubleshoot this?


More information about the freebsd-questions mailing list