On Tue, Nov 4, 2008 at 7:00 PM, Graham Dumpleton <[EMAIL PROTECTED]
> wrote:

>
> 2008/11/5 Ariel <[EMAIL PROTECTED]>:
> >
> >
> >
> >    > I am using mod_wsgi for deployment but recently my apache
> > installation on
> >    > ubuntu 8.04 just locks after any start, stop or reload commands.
> >    >
> >    > I uninstalled it, wiped configuration settings, uninstallled
> > mod_python that
> >    > was installed just before it did not respond anymore.
> >
> >    It is a known problem that loading mod_python and mod_wsgi at the
> > same
> >    time causes problems if Python not installed with a usable shared
> >    library.
> >
> >     http://code.google.com/p/modwsgi/wiki/InstallationIssues
> >
> >    > Is there any other server I can install that works with modwsgi?
> > (I am using
> >    > trac and django on the same server configured via mod_wsgi)
> >
> >    You mean other than Apache?
> >
> >    It seems you haven't explored properly yet why you were having the
> >    problems you were.
> >
> >    Graham
> > -----
> >
> > Yeah, I really don't know what to do next, I already disabled
> > mod_python.
> >
> > And tried rebooting my server but even though it says it is going for
> > reboot it does not do so. (It is an Amazon EC2 instance so I am kind
> > of afraid of terminating the instance, although I already made a
> > backup of the most important stuff)
> >
> > Any advice on how to debug this? I checked apache logs but nothing
> > there.
>
> When you say 'rebooting my server', do you mean just Apache or the
> whole system? I don't know how Amazon EC2 works.
>
> If you mean just Apache, do be aware that when removing mod_python,
> generally necessary to do a full 'stop' of Apache. It isn't always
> enough to do an equivalent of 'apachectl restart' because mod_python
> doesn't cleanup properly and tends no to unload correctly on a restart
> where Apache parent process persists. Therefore causes issues for
> mod_wsgi on the restart even though mod_python technically now
> disabled.
>
> If you have a site you can point me to which explains how Amazon EC2
> is set up, or if you or anyone else can explain what it really is,
> ie., VPS, shared system of some sort, whether you have shell access
> etc, that may help.

Amazon EC2 is a VPS, but the instance does not have persistent storage,
instead it is always loaded from an image (called AMI), that image is
usually stored in S3. I did one snapshot after I finished configuring my
server, but that was 4 months ago and I am afraid I (may) not have
everything backed up. (Trac repos, mercurial repos, django database
records).
I have full ssh access and root account.


> Anything from the Apache error log files would
> also help, particularly the startup message which lists what modules
> are loaded.
>
> Has anyone else here got experience with Amazon EC2 with or without
> mod_wsgi?
>
> Graham
>
>
Well, I did '/etc/init.d/apache2 stop' with  no luck, then I just ps -A |
grep apache and killed everything.
After that a '/etc/init.d/apache2 start' just hangs with no error on apache
logs.

I check system messages and it turns out:*
[EMAIL PROTECTED]:/var/log/apache2#  tail -f /var/log/messages
*Nov  4 23:59:47 pinax kernel: 4gb seg fixup, process bash (pid 23795),
cs:ip 73:0016b817
Nov  4 23:59:48 pinax kernel: printk: 2 messages suppressed.
Nov  4 23:59:48 pinax kernel: 4gb seg fixup, process sshd (pid 23767), cs:ip
73:0047cc6c
Nov  4 23:59:54 pinax kernel: printk: 109 messages suppressed.

Maybe it is directly related to Amazon machines:
http://groups.google.com/group/ec2ubuntu/browse_thread/thread/a145b228d83c0b71

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