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Reply to topic   Topic: Apache times out when multiple vhosts are in place
Author
jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Tue 21 Apr '15 21:22    Post subject: Apache times out when multiple vhosts are in place Reply with quote
Hey guys,

Before I had a problem when I had multiple (at least 5) vhosts set to Apache when it just hanged, this was fixed adding:

Code:
Acceptfilter http none
Acceptfilter https none


To my httpd.conf, but now it's not hanging, it just times out, I get no error, nothing in the error.log file, it just times out.

After doing a refresh, it comes back like nothing happened.

Any ideas?

Thanks.
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DnvrSysEngr



Joined: 15 Apr 2012
Posts: 218
Location: Denver, CO USA
PostPosted: Wed 22 Apr '15 7:42    Post subject: Reply with quote
I run 4 VHosts, and have no hangs.

Did you add all of these lines to your httpd.conf?

AcceptFilter http none
AcceptFilter https none
EnableSendfile off
EnableMMAP off

-S
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Wed 22 Apr '15 14:59    Post subject: Reply with quote
EnableSendfile and EnableNMAP are off, also, it does this when somebody is browsing a newly added vhost, when nobody is brwosing the newly added vhost it's fine.
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DnvrSysEngr



Joined: 15 Apr 2012
Posts: 218
Location: Denver, CO USA
PostPosted: Wed 22 Apr '15 15:06    Post subject: Reply with quote
My next questions would be:

Are you on a Windows server or Linux server?

Is it a particular vhost or any vhost that is causing the performance issue?

-S
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Wed 22 Apr '15 17:27    Post subject: Reply with quote
Windows and it didn't have this before I added a new vhost.

The new vhost is setup exactly the same way as all the others and it's running the same kind of scripts as all the others (PHP w/MySQL database)

I'm using Apache 2.4.9 x64 with PHP 5.6.7 x64 and MariaDB 10.10 (WAMP server)
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DnvrSysEngr



Joined: 15 Apr 2012
Posts: 218
Location: Denver, CO USA
PostPosted: Wed 22 Apr '15 19:27    Post subject: Reply with quote
You mentioned, "same kind of scripts." I take it they are not the same exact scripts as those in the other VHosts?

With that in mind, could you disable the VHost that is causing issues for a short period of time to see if that resolves the issue?

Also, you mentioned that nothing shows in the logs? Are you looking solely at the logs for Apache? Have you looked for anything in the event view for windows?

What about Task Manager? Is the Apache process consuming excessive memory and/or CPU utilization?

These are just some of my ideas. If it is a DB or PHP script issue, then it starts to get beyond my scope of knowledge. Maybe our resident admins/gurus, Gregg, James or Steffen might have some ideas?
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glsmith
Moderator


Joined: 16 Oct 2007
Posts: 2268
Location: Sun Diego, USA
PostPosted: Wed 22 Apr '15 21:27    Post subject: Reply with quote
2.4.9 huh, you may never find anything in your logs. If you're running mod_deflate someone may be using CVE-2014-0118 (fixed in 2.4.10) against you. I'm not saying anyone is but it's a possibility. If it showed up in the logs would simply look like a legitimate request in the access log, probably would not show in the error log and may show in the Event Viewer but not stating anything usable to know what was going on.

You are using AcceptFilter protocol none which is published as a workaround for CVE-2014-3523 (fixed in 2.4.10) but who knows if it's a perfect workaround.

Again, I'm not saying anyone is using these against you, it's just a possibility since you have not upgraded your Apache in over a year. You're pretty up-to-date with your php so you've been upgrading it, why not Apache too?

It's hard to say. Is this new vhost a somewhat popular host that was moved from another server?
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Fri 24 Apr '15 20:54    Post subject: Event Viewer Reply with quote
Event Viewer is showing an error in Apache, here it is:

Code:
Faulting application name: httpd.exe, version: 2.4.9.0, time stamp: 0x53258cd5
Faulting module name: php_mbstring.dll, version: 5.6.7.0, time stamp: 0x550b4e16
Exception code: 0xc0000005
Fault offset: 0x0000000000003e7b
Faulting process id: 0x2078
Faulting application start time: 0x01d07ebfa76914f9
Faulting application path: D:\Apache24\bin\httpd.exe
Faulting module path: D:\PHP\ext\php_mbstring.dll
Report Id: ef5dda18-eab2-11e4-afe1-00155d003b04


I guess I'm going to have to file a bug with PHP and their mbstring extension.

Thanks.
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Fri 24 Apr '15 21:21    Post subject: Reply with quote
I did put a bug in PHP, but I just tested the same script (osTicket) on my own machine (without multiple vhosts) and it did not make Apache restart/crash.

The only difference besides the vhosts is that I have a newer version of Apache, where it crashes it's Apache 2.4.9, I have 2.4.12

Do you think that might still be an Apache problem?
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Mon 27 Apr '15 15:04    Post subject: Reply with quote
I updated Apache to 2.4.12 and it still happens, so I now have both Apache and PHP the latest version and both have been notified of the problem, any ideas what I can do?

Thanks.
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glsmith
Moderator


Joined: 16 Oct 2007
Posts: 2268
Location: Sun Diego, USA
PostPosted: Tue 28 Apr '15 1:41    Post subject: Reply with quote
Well, I'm not a very php informed person. I will say your Apache bug report will probably be closed as invalid because it's a php extension causing the problem. Usually caused by some specific code in your php script itself (someone jump in if I'm incorrect here).
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 7294
Location: Germany, Next to Hamburg
PostPosted: Tue 28 Apr '15 11:18    Post subject: Reply with quote
it says "php_mbstring.dll" crashes your apache. So some mb_* function causes that. If you can't disable that you might use php over mod_fcgid
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Jan-E



Joined: 09 Mar 2012
Posts: 1248
Location: Amsterdam, NL, EU
PostPosted: Tue 28 Apr '15 14:00    Post subject: Reply with quote
What happens if you define multiple vhosts on your local machine? Does it crash?

If so, could you try the same setup with the x86 Apache and PHP?

BTW In https://bugs.php.net/bug.php?id=69528 you suggest to install osticket and run it. That is a package with about 280 lines in it with 'mb_'. If you want the PHP devs to help you, you will have to dig a lot deeper and provide a really small reproducible script.
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jfha73



Joined: 18 Aug 2011
Posts: 62
Location: New York
PostPosted: Thu 30 Apr '15 19:02    Post subject: Reply with quote
I just wanted to cover all the bases, I notified everybody, Apache, PHP and osTicket, to see if we can work together and solve it.
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