I have a weird stalling/hanging issue with FreeBSD 10.0 (64 bit) and sabnzbd+ 0.718. The system is a storage server with a fairly minimal number of packages, mostly NFS and Samba server, couple of support packages and nessusd service. 32 GB of RAM, Xeon E5430 CPU, boot drive is a ZFS file system on SSD, mass storage is a 24 TB RAIDZ2 pool (SAS controller with JBOD box). System is running headless, administration is by SSH login. sabnzbd is using its own user ID, no root privileges. Load average with sabnzbd running is about 0.7, Python is version 2.7.
Whenever the sabnzbd service is running, sabnzbd will eventually, after an undetermined amount of time, "soft freeze". The system will stall, downloads stop, web interface will not respond. Even the clock on the server will stop and sometimes, NFS and Samba will stall. Once I either login to the server or, if already logged in, issue any command, everything will resume working as if nothing had happened. There is nothing unusual in the sabnzbd log file.
The only thing I am certain about is that this problem is tied to sabnzbd - no stalls on the server when sabnzbd service is not running.
I am not sure what additional information would be required, but will gladly provide what is needed. Any help is greatly appreciated.