On Dec 18, 2006, at 16:17, Mark Belanger wrote:
> I have many different centos machines that are hanging
> regulary. I believe this is due to something our application
> is doing - not a centos specific problem.
I have the same problem. I even posted something to this list titled
"Strange system hangs" on 11/27 but didn't get any responses.
> When the machines hang, there is no access to the console
> or remote access(ssh, rsh, etc).
I have that symptom as well. No way to do any debugging after it
gets into that state. So I added the following two lines to the /etc/
syslog.conf file:
kern.* @<central server>
*.info;mail.none;authpriv.none;cron.none @<central server>
Should I add any other levels to the selector field? BTW, my systems
are running completely stock CentOS distribution EXCEPT for the
binary nVidia driver, which was the only way I could get these
systems to drive the 20" LCD displays at their native 1600x1200
resolution using the correct refresh rate.
I had another report of a hang this morning, but in this case even
though the machine appears frozen (the screen saver is stuck and I
can't get to the alternate consoles), I can in fact log into the
machine remotely and top shows me that the X server is using 100% of
the CPU:
top - 08:44:22 up 10 days, 23:00, 10 users, load average: 1.04,
1.01, 1.00
Tasks: 115 total, 2 running, 113 sleeping, 0 stopped, 0 zombie
Cpu(s): 99.7% us, 0.3% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0%
hi, 0.0% si
Mem: 3113468k total, 1361240k used, 1752228k free, 87312k
buffers
Swap: 3047416k total, 0k used, 3047416k free, 957756k
cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4381 root 25 0 67748 42m 7776 R 99.8 1.4 782:53.37 X
I also see the following in /var/log/messages:
Dec 18 19:56:02 hepdsw04 kernel: NVRM: Xid (0001:00): 8, Channel
00000001
Dec 18 19:56:03 hepdsw04 kernel: NVRM: Xid (0001:00): 9, Channel
00000020 Instance 00000000 Intr 00100000
Dec 18 19:56:09 hepdsw04 Synergy 1.3.1: NOTE: CServerProxy.cpp,
315: server is dead
Dec 18 19:56:10 hepdsw04 kernel: NVRM: Xid (0001:00): 8, Channel
00000020
Dec 18 19:56:11 hepdsw04 kernel: NVRM: Xid (0001:00): 9, Channel
00000020 Instance 00000000 Intr 00100000
Dec 18 19:56:18 hepdsw04 kernel: NVRM: Xid (0001:00): 8, Channel
00000020
Dec 18 19:56:19 hepdsw04 kernel: NVRM: Xid (0001:00): 9, Channel
00000020 Instance 00000000 Intr 00100000
Dec 18 19:56:26 hepdsw04 kernel: NVRM: Xid (0001:00): 8, Channel
00000020
Dec 18 19:56:27 hepdsw04 kernel: NVRM: Xid (0001:00): 9, Channel
00000020 Instance 00000000 Intr 00100000
Dec 18 19:56:34 hepdsw04 kernel: NVRM: Xid (0001:00): 8, Channel
00000001
What is the meaning of the NVRM entries? The Synergy entry is from
the keyboard/mouse sharing Synergy utility (great program BTW, I
couldn't live without it).
Anyway, sorry to inject my own problems into this thread, but maybe
these hangs are all related.
Alfred