What is causing - PHP has encountered an Access Violation at 7C8224B2?

[pgowder]

Here's my site:

https://www.powwows.com

Forum:

https://www.powwows.com/gathering

Server Info:
Windows 2003
IIS 6.0

PHP
4.4.3

MySQL
5.0.37

Help! What is causing me to get these errors?

Thanks!

[TommyBALL]

It's caused by parts of PHP that where not written with the treaded process model of windows in mind. The PHP core itself works fine in a threaded environment like Windows, but many (most?) extensions where written by Linux/*nix coders that find coding in a thread-safe manner too complicated to handle (or they just don't care ).

I notice that you are running an old and insecure version of PHP. You should upgrade ASAP (http://www.php.net)
Also, disable all extensions you do not really need.
Some more info in the following thread:

http://www.vbulletin.com/forum/showthread.php?t=212192

So how can you really resolve this in a good manner? There is not really any perfect solution to it till MicroSoft and Zend finish their FastCGI implementation. This will let non-thread-safe stuff run on IIS in a more stable manner, while keeping performance up to (or even surpass) ISAPI levels (as opposed to slooow regular CGI).

More on the FastCGI project can be read on MicroSoft's official IIS website:

http://www.iis.net

FastCGI is being made for IIS 5/6/7. It will be included as a natural part of Longhorn (the next windows server version).

I'm running vBulletin quite successfully with absolutely no Access Violations on the setup in my signature below.

Regards
- Tommy

[pgowder]

It's caused by parts of PHP that where not written with the treaded process model of windows in mind. The PHP core itself works fine in a threaded environment like Windows, but many (most?) extensions where written by Linux/*nix coders that find coding in a thread-safe manner too complicated to handle (or they just don't care ).

I notice that you are running an old and insecure version of PHP. You should upgrade ASAP (http://www.php.net)
Also, disable all extensions you do not really need.
Some more info in the following thread:

http://www.vbulletin.com/forum/showthread.php?t=212192

So how can you really resolve this in a good manner? There is not really any perfect solution to it till MicroSoft and Zend finish their FastCGI implementation. This will let non-thread-safe stuff run on IIS in a more stable manner, while keeping performance up to (or even surpass) ISAPI levels (as opposed to slooow regular CGI).

More on the FastCGI project can be read on MicroSoft's official IIS website:

http://www.iis.net

FastCGI is being made for IIS 5/6/7. It will be included as a natural part of Longhorn (the next windows server version).

I'm running vBulletin quite successfully with absolutely no Access Violations on the setup in my signature below.

Regards
- Tommy

So moving to PHP 5.2.x will solve it or I still need to implement FastCGI also? Is that stable for use?

[TommyBALL]

So moving to PHP 5.2.x will solve it or I still need to implement FastCGI also? Is that stable for use?

It depends on what PHP applications you are running, what PHP extensions they require, and how thread-safe those extensions are.
FastCGI is not even in Beta yet.

Regards
- Tommy

[pgowder]

It depends on what PHP applications you are running, what PHP extensions they require, and how thread-safe those extensions are.
FastCGI is not even in Beta yet.

Regards
- Tommy

Thanks, I'll give 5.2 a try. Cross my fingers and hope it improves it!

[007]

Actually FastCGI is in Beta now and has been for a while.

Go to the link below for the official donwload. It comes with a readme file that should help you get everything set up properly.

http://www.iis.net/default.aspx?tabid=1000051

[TommyBALL]

Nope. It's still in Technical Preview 2.

http://mvolo.com/blogs/serverside/archive/2007/05/29/The-latest-on-the-FastCGI-project-and-PHP-support-on-IIS.aspx

While we are still working on the Beta release for the IIS5/IIS6 version of FastCGI, we didn’t want to leave you hanging – so, if you are having any trouble with TP2, you can download the latest developer release of out-of-band FastCGI that fixes a few problems reported by the community since TP2’s release.

[todd222222]

Tommy,
Several months ago I switch to apache on windows 2003 because of these problems. I was running php 5.2.1 and only have these extenstion installed: php_gd2.dll and php_mysql.dll

I would love to go back to IIS. I'm not running xcache or memcached, do you think running php 5.2.2 and these two apps would stop the errors?

thanks

[TommyBALL]

For whatever it's worth: I have not had a single access violation with 5.2.2. A few others have reported that they've not had any access violation either, with such a setup, since 5.2.2.

My setup is in my signature below. The server is a VMWare virtual machine. I only run vBulletin on it. Five instances of vBulletin. 3 are my own. 2 hosted for others. All 5 forums run in the same Application Pool with 3 worker processes in a Web Garden setup.

My PHP extensions are:
extension=php_xcache.dll
extension=php_gd2.dll
extension=php_mbstring.dll
extension=php_mysqli.dll
extension=php_memcache.dll

I use IIS for http-compression (instead of PHP/vBulletin)... with a few tweaks in the metabase.

Regards
- Tommy

[Computer Guru]

For what it's worth - for anyone having this bug, we managed to solve it on our servers by switching to Microsoft's own proprietary (and free) FastCGI implementation: http://www.iis.net/default.aspx?tabid=1000053

[Wayne Luke]

That is still in beta correct? With a final version due with IIS7.

[TommyBALL]

That is still in beta correct? With a final version due with IIS7.

It hasn't even reached beta stage yet.

http://www.vbulletin.com/forum/showpost.php?p=1365103&postcount=7

[pgowder]

FastCGI was terrible for me! It opens a new process for each PHP session. I have a very busy server and that killed all available memory.

[todd222222]

Ok another question?

What is this? http://phplens.com/phpeverywhere/fastcgi-php

It's also called FastCGI but is it different than the one at www.iis.net?

[Wayne Luke]

FastCGI is simply an architecture just like CGI is an architecture. This is simply a third-party (meaning not Microsoft or PHP) implementation of it.