APC causing Apache to stop during upload of files

[sysop1911]

I run a Windows Server 2003 with Apache 2.2.9, PHP 5.2.6, Mysql 5.0.51b and an open-source CMS.  About half the times when our content-mangers try to upload files to the server, Apache stops and I have to manually restart it.  When I go to the Apache logs I ALWAYS get these two errors:

 

[apc-error] apc_fcntl_unlock failed errno:6

[crit] Parent: child process exited with status 2 -- Aborting.

 

The second error follows the first error by about 5 seconds.  The second error is always at the exact time Event viewer says that Apache stopped.

 

In the PHP.INI file the only thing I have under APC is apc.mode=On.  It looks like this:

 

[APC]

;zend_extension = ""

apc.mode = on

;apc.mode = shm

 

Also, in the extensions list is:

 

extension=php_apc.dll

 

Does anyone have any idea what this is?  I assume that since there are not many settings under the [APC] area of PHP.INI that it means it is using most of the defaults.  Thanks.

 

Sysop1911