9.1 system hung with top open on console, yet responsive on ssh sessions?
dweimer
dweimer at dweimer.net
Wed Dec 12 22:24:24 UTC 2012
On 2012-12-12 15:58, dweimer wrote:
> I ran into a weird one, have a 9.1 test system (virtual in VMWare
> Workstation 9) that I left running logged into the console with top
> running. The console the top process it was running appear to have
> hung, can't use ALT + F1,F2... to switch virtual consoles. However I
> can log in to the system via ssh, if you run top you get the same
> information on the console, can even interact with it, switching
> search order and the like. systat also seems to not display current
> information. I can do everything I have tried through the console
> except I noticed that syslog isn't writing data and a
> /etc/rc.d/syslog
> restart hung as well.
>
> This is just a test system running one single Java program (Ubiquiti
> UniFi controller software) that is responding just fine as well.
> Thought maybe it was disk access related, however I have confirmed
> that I can read and write to the disk, used dd if=/dev/random
> of=/.../random.out..., to each file system and was able to write to
> all of them. Before I reboot the system (I have a feeling it won't
> reboot cleanly), I was curious if anyone else has ever seen this and
> what I should check to possibly identify what caused the problem.
Might have discovered its probable related to
<http://docs.freebsd.org/cgi/getmsg.cgi?fetch=294987+0+archive/2012/freebsd-stable/20120805.freebsd-stable>
as I noticed as well that that date command was always returning
yesterdays date with the time set the same as top returned.
I went ahead and reset the virtual machine with the sysctl value set as
listed in the thread linked to above. will see if I hit the issue again
or not. Though this application will be moved off this test system to
my actual serve as soon as the 9.1-Release is official. so it may not
be running long enough to know if that is the real solution.
--
Thanks,
Dean E. Weimer
http://www.dweimer.net/
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