Date: Sun, 11 Nov 2018 10:03:07 +0100 From: David Demelier <markand@malikania.fr> To: freebsd-questions@freebsd.org Subject: Unkillable process in a ZFS jail Message-ID: <687be81a7d4b9342d3f1643ce6fc5dbe83c7b099.camel@malikania.fr>
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Hello there, I've just realized there was a process burning my small dedicated server CPU for 4 days long. The process was spawn in a ZFS jail from buildbot service. top shown this: buildbot 1 20 0 0K 16K CPU0 0 83.5H 101.02% python2.7 No kill -9 was able to stop the process, the jail was also unstoppable. And any filesystem operation in that jail got stuck. Just like editing /etc/rc.conf didn't terminate correctly. I remember there was a ZFS issue a long time ago about deadlocks, but I'm not sure it's still present, my server runs FreeBSD 11.2. This leads me to these questions: 1. Is there some issue regarding ZFS? What to do if a process is unkillable? 2. Do you know any kind of monitoring service or periodic files that reports too many CPU usage after a while? By sending a mail that would be very handy. Regards, -- David
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