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Re: New Kernel Less Stable than Last Kernel
Posted: Sat Aug 27, 2011 11:40 pm
by premierhosting
Done, where should I look for results?
Re: New Kernel Less Stable than Last Kernel
Posted: Sun Aug 28, 2011 12:36 pm
by mikeshinn
If you configured syslog correctly, then you should start to see lines in your syslog like this:
Aug 28 12:34:46 hostname -- MARK --
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 02, 2011 10:47 am
by Troy McClure
premierhosting,
I am having this same exact problem. I didn't realize there was another thread about this issue. I will start posting to this thread. Here is my thread (
http://www.atomicorp.com/forum/viewtopi ... 4&start=30). I am going to downgrade my kernel to kernel-2.6.32.41-4.art and see if that helps. I just moved to this server, so I haven't tried running that kernel yet. I have run kernel-2.6.18-238.9.1.el5 without any problems for over a month though. Like you, I haven't been able to resolve this issue. It just hangs and I have to reboot it from the 1and1 admin panel. The hangs are completely random. Day, time of day, part of the hour, etc. are all random for me.
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 02, 2011 12:10 pm
by premierhosting
Hi Troy,
Let me know the results of your kernel downgrade! I still haven't bit the bullet on that. I use the sercon to take a peek and watch it come back up and it's always just "hung". Really weird. Did you have to disable your s99raid as well? The raid1 sync process always takes a bunch of resources after a hang-reboot, which makes me think there's some disk integrity issues going on.
The link appears to be to this thread, want to try again?
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 02, 2011 12:13 pm
by premierhosting
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 02, 2011 2:34 pm
by Troy McClure
Ha, oops. Here is my thread -
http://www.atomicorp.com/forum/viewtopic.php?f=3&t=5120. Looking back over that, I have tried the 41-1 kernel. Oh well, guess that isn't going to help me. I thought I had only used the latest kernel, but I forgot that this did happen when I first setup ASL and the current kernel was 41-1. I have tried these kernels with the same results (2.6.32.41-4.art.x86_64, 2.6.32.41-1.art.x86_64, and 2.6.32.43-6.art). I do check sercon too with the same results as you. By chance is your server a newer server? I just got mine 3 or 4 months ago. I was also involved in that 99-raid-check thread. I did have problems with it, but was able to add it back about 1 month ago and haven't seen the problem again. Not sure what changed with that.
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 02, 2011 3:12 pm
by Troy McClure
Mike, could you tell me the furthest back I can go on the kernel and not be left more vulnerable than the current kernel? I would like to go back as far as possible just to see if it will fix the problem, but don't want to open my server up to problems.
Re: New Kernel Less Stable than Last Kernel
Posted: Sat Sep 03, 2011 6:18 am
by premierhosting
BTW, this could be related, plesk backup to FTP is a doozy.
Code: Select all
#ps faxww
7348 ? S 0:12 /usr/bin/perl /usr/local/psa/admin/bin/plesk_agent_manager server --owner-uid=ac58d447-e66b-4e13-bbe7-96cfa2e09468 --dump-rotation=7 --session-path=/usr/local/psa/PMM/sessions/2011-09-03-021903.773 --output-file=ftp://user@backupserver/ --ftp-passive-mode
14215 ? S 0:25 \_ /usr/bin/perl /usr/local/psa/admin/bin/plesk_agent_manager server --owner-uid=ac58d447-e66b-4e13-bbe7-96cfa2e09468 --dump-rotation=7 --session-path=/usr/local/psa/PMM/sessions/2011-09-03-021903.773 --output-file=ftp://user@ --ftp-passive-mode
14217 ? D 0:11 | \_ /bin/tar -f - -c -T /tmp/fileFkvVg4
14216 ? S 0:19 \_ /usr/bin/perl /usr/local/psa/admin/bin/plesk_agent_manager server --owner-uid=ac58d447-e66b-4e13-bbe7-96cfa2e09468 --dump-rotation=7 --session-path=/usr/local/psa/PMM/sessions/2011-09-03-021903.773 --output-file=ftp://user@/ --ftp-passive-mode
7350 ? S 0:00 python /usr/local/psa/admin/share/pmmcli/pmmcli_daemon_runner.py
14329 ? S 0:00 /usr/bin/perl -w /usr/bin/psmon --daemon --cron
# w
03:16:41 up 7 days, 20:05, 2 users, load average: 25.48, 10.95, 5.10
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
russell pts/0 76.178.183.164 00:30 0.00s 0.32s 0.02s sshd: russell [priv]
root ttyS0 - 26Aug11 7days 0.03s 0.03s -bash
Re: New Kernel Less Stable than Last Kernel
Posted: Tue Sep 20, 2011 8:40 pm
by premierhosting
Well, I haven't had a freezeup in 14 days. What I did was add an httpd restart to cron on the hour. I did that because occasionally httpd would coredump and go stupid until it was restarted. Couldn't figure out why it was coredumping but an occasional restart seems to "fix" it.
Noticed on another thread that httpd freezeups can have ASL causes. Any suggestions on how to track that down? I'm getting the sense that perhaps a memleak or race in httpd was causing the real issue.
Re: New Kernel Less Stable than Last Kernel
Posted: Wed Sep 21, 2011 4:42 pm
by mikeshinn
Well, I haven't had a freezeup in 14 days. What I did was add an httpd restart to cron on the hour. I did that because occasionally httpd would coredump and go stupid until it was restarted. Couldn't figure out why it was coredumping but an occasional restart seems to "fix" it.
Have you looked at the core dumps to see whats causing them?
Noticed on another thread that httpd freezeups can have ASL causes.
They can? I'm not aware of any. Can you tell me what threads?
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 23, 2011 4:40 pm
by premierhosting
Trying to find the thread, maybe I read something wrong
On core dumps, when I have them enabled I run risks of filling up the disk, right? I have them enabled right now, and I can have some PHP (wordpress) page load that show up blank. No core dump, no php error, no apache error. Just blank page. I restart httpd and bingo, page processes and displays.
Trying to generate the core dump situation.
Re: New Kernel Less Stable than Last Kernel
Posted: Fri Sep 23, 2011 6:09 pm
by mikeshinn
Re: New Kernel Less Stable than Last Kernel
Posted: Mon Oct 10, 2011 2:59 pm
by premierhosting
Oh look someone else with the same types of issues and fixes. A bunch of people, even some of them with ASL and 1and1.
http://forum.parallels.com/pda/index.php/t-108340.html
Re: New Kernel Less Stable than Last Kernel
Posted: Mon Oct 10, 2011 3:37 pm
by mikeshinn
I cant find anything in that thread about any kernel, ASL or 1and1. Did you mean a different thread?
Re: New Kernel Less Stable than Last Kernel
Posted: Tue Oct 11, 2011 9:20 pm
by premierhosting
atomicturtle - not you guys?
No kernel mention, but the stability / memory issues could have come up with the Plesk upgrade as it was about the same time as the kernel upgrade. The fix for the thread and my fix have been the same - restart apache at intervals. Which is not a fix, just a workaround.