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saber850
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Joined: 21 Mar 2004
Posts: 115
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PostPosted: Thu Jan 17, 2013 5:24 pm    Post subject: Apache stopped starting Reply with quote

I restarted my computer yesterday and (for the first time in a very long time) Apache didn't start.

I looked into the problem and the error log (var/log/apache2/error_log) reports this:
Code:

[Thu Jan 17 11:47:42 2013] [error] (2)No such file or directory: Cannot create SSLMutex with file `/var/run/apache2/ssl_mutex'


Sure enough the directory--/var/run/apache2--does not exist, and hence the error (and this is enough for apache to fail to start all together--it does not just disable SSL support).

I've confirmed that if I manually create the /var/run/apache2 directory and attempt to start apache, it works.

So I understand the problem, but I don't know what provoked this change, nor how to properly fix it.

Regarding what changed: The last time I restarted the computer was ~2 months ago, and everything started up fine. AFAIK, I didn't modify anything relating to apache since then, but I do keep my system up to date via daily emerge -uavND world.

So what is the proper way to fix this? Will the directory that I manually created persist through a reboot? Should one of the apache startup scripts create this directory?
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eccerr0r
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Joined: 01 Jul 2004
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PostPosted: Thu Jan 17, 2013 6:20 pm    Post subject: Reply with quote

Have you etc-update/dispatch-conf after upgrading apache?
It appears the SSL mutex file is defined in /etc/apache2/modules.d/40_mod_ssl.conf for me...

/var/run should be on tmpfs nowadays, so it will disappear on reboots.
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saber850
Tux's lil' helper
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Joined: 21 Mar 2004
Posts: 115
Location: NY

PostPosted: Thu Jan 17, 2013 8:26 pm    Post subject: Reply with quote

eccerr0r wrote:
Have you etc-update/dispatch-conf after upgrading apache?

First, note that apache hasn't been rebuilt for me since Oct 17, 2012 (and I'm note sure that was an actual update or just a rebuild due to use flag changes).

But to answer your question, yes, I run etc-update when emerge informs me there are config files to be merged, and occasionally otherwise.

eccerr0r wrote:
It appears the SSL mutex file is defined in /etc/apache2/modules.d/40_mod_ssl.conf for me...

Yes, same for me.

eccerr0r wrote:
/var/run should be on tmpfs nowadays, so it will disappear on reboots.

Yes, that's the case for me:

Code:
# ls -hal /var/run
lrwxrwxrwx 1 root root 4 Dec 20 00:23 /var/run -> /run

# mount | grep run
tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)


So I'm still faced w/ figuring how best to create this directory upon reboot.
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eccerr0r
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PostPosted: Thu Jan 17, 2013 10:44 pm    Post subject: Reply with quote

So did you fix the configuration file that specifies the mutex file?
Code:
doujima:/etc/apache2/modules.d$ equery list apache
 * Searching for apache ...
[IP-] [  ] www-servers/apache-2.2.23:2
doujima:/etc/apache2/modules.d$ grep -i sslmutex 40_mod_ssl.conf
SSLMutex  file:/var/run/ssl_mutex
doujima:/etc/apache2/modules.d$


Written straight into /var/run which is always there, for me.

And USE flag changes can still require config file changes. Every time something merges, you have the possibility of needing to fix a config file even if it's just USE file changes.

And oh... yes... baselayout was probably revved within the last few months. The /var/run -> /run was a fairly recent change...
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saber850
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Joined: 21 Mar 2004
Posts: 115
Location: NY

PostPosted: Fri Jan 18, 2013 5:55 am    Post subject: Reply with quote

eccerr0r wrote:
So did you fix the configuration file that specifies the mutex file?
Code:
doujima:/etc/apache2/modules.d$ equery list apache
 * Searching for apache ...
[IP-] [  ] www-servers/apache-2.2.23:2
doujima:/etc/apache2/modules.d$ grep -i sslmutex 40_mod_ssl.conf
SSLMutex  file:/var/run/ssl_mutex
doujima:/etc/apache2/modules.d$


Written straight into /var/run which is always there, for me.

As of this writing, I have not done anything for a permanent fix--that's what I'm trying to find out: what is the proper fix. There are multiple possibilities that I'm aware of. One is as you've shown: change the configuration to use a directory which is expected to be there upon boot. Another is to have a script create the directory.

I guess I'm asking if there is a prescriptive suggestion, possibly to align w/ however apache would be deployed on a fresh system (my install of Gentoo took place ~2004).

eccerr0r wrote:
And USE flag changes can still require config file changes. Every time something merges, you have the possibility of needing to fix a config file even if it's just USE file changes.

Right, I'm aware of that, I just didn't want to get off topic. But since the topic is upon us... I run etc-update when emerge informs me there are config files to be merged, and occasionally otherwise. Is that problematic?

eccerr0r wrote:
And oh... yes... baselayout was probably revved within the last few months. The /var/run -> /run was a fairly recent change...

Good to know, thanks.
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