I've created a straightforward Rails app for a client and it runs great on my FreeBSD 6 box. When we deploy it on his Redhat 7.2 server, both WEBrick and Mongrel start and run fine, but will only stay up for a couple of hours. We'll find them dead with absolutely no information in the logs. No core dumps. Nothing in /var/log/messages. Just gone. The process will die even if idle, so I don't think there's anything in the actual app that's causing the problem.
In desperation, I started Mongrel as root and the darn thing is staying up. I know zilch about Linux admin. Is there something I'm missing here? There are no obvious per-user process limits (memory, CPU, etc.) as far as I can tell.
Craig White wrote: >> There are no obvious per-user process limits (memory, CPU, etc.) as far >> as I can tell. > ---- > I'm not gonna even speculate but RHL 7.2 has been EOL for at least 4 > years. Why not use CentOS 4 ?
Because a) I'm a programmer not a sysadmin, and b) I don't have any idea what RHL 7.2 and CentOS 4 even are, sadly :~) Heck, it may not even by RHL 7.2 for all I know. It's what cat /etc/redhat-release says, but who knows if that's right?
Sounds like you may be hitting a system limit and your processes are being killed.
Run ulimit -a as your user and as root to see the difference.
jeremy
You get an error that /proc must be mounted (?). Is this normal for Linux?
Jeremy Kemper wrote: >> Because a) I'm a programmer not a sysadmin, and b) I don't have any idea >> what RHL 7.2 and CentOS 4 even are, sadly :~) Heck, it may not even by >> RHL 7.2 for all I know. It's what cat /etc/redhat-release says, but who >> knows if that's right? >> >> His box seems wacky to me. Non-root users can't run ps, or who, or top. >> You get an error that /proc must be mounted (?). Is this normal for >> Linux? > > > Sounds like you may be hitting a system limit and your processes are > being > killed. > > Run ulimit -a as your user and as root to see the difference.
That's what I thought, but here's what I get:
[root@blah]# ulimit -a core file size (blocks) 0 data seg size (kbytes) unlimited file size (blocks) unlimited max locked memory (kbytes) unlimited max memory size (kbytes) unlimited open files 1024 pipe size (512 bytes) 8 stack size (kbytes) 8192 cpu time (seconds) unlimited max user processes 4082 virtual memory (kbytes) unlimited [root@nimbus prop]# su - bob [bob@blah]$ ulimit -a core file size (blocks) 0 data seg size (kbytes) unlimited file size (blocks) unlimited max locked memory (kbytes) unlimited max memory size (kbytes) unlimited open files 1024 pipe size (512 bytes) 8 stack size (kbytes) 8192 cpu time (seconds) unlimited max user processes 4082 virtual memory (kbytes) unlimited
I think there's something on the box that's killing of processes. I did a ps and found three daemons running that are all encrypted Perl scripts (the first line is "use Filter::decrtypt", and the rest is gibberish):
monstd syswatchd healthd
These all live in /usr/prop/sbin. There's also a bunch of cron jobs that run stuff in /usr/prop/sbin.
After some googling, I figured out how to:
# rpm -q --file /usr/prop/sbin/syswatchd helix-syswatchd-ded72-1-1
Does this mean anything to anyone? I appreciate all the help.