Friday, December 24, 2010

[warn] (2)No such file or directory: Failed to enable the 'httpready' Accept Filter

When Apache web server
is starting up in FreeBSD system, Apache loads succcessfully and web server functioning properly, but the following warning error occurs:

[warn] (2)No such file or directory:
Failed to enable the ‘httpready’ Accept Filter

The resolution to the above problem is to a accf_http module, which function is to buffer incoming connections until a certain complete HTTP requests arrive, into FreeBSD kernel by using kernel linker:

kldload accf_http

To permanently load enable HTTP Accept Filter FreeBSD kernel module (accf_http), add the following line into /boot/loader.conf:


Note: The default settings is located in /boot/defaults/loader.cnf. To see the related settings about accf, use:

grep accf /boot/defaults/loader.conf

which will returns:

accf_data_load=”NO” # Wait for data accept filter
accf_http_load=”NO” # Wait for full HTTP request accept filter

============ [START] httpready accept filter problem solution ==============
Note: rc.d script for apache now manage this accf_http kernel module
Just add following line to your /etc/rc.conf
root@bmw0 [/root] # vi /etc/rc.conf

Please note that there is a line in httpd.conf:

Include etc/apache22/Includes/*.conf

the line above includes one of files called:


This file above turns accf_http off.

So, make sure you do comment out two lines in /usr/local/etc/apache22/Includes/no-accf.conf:

#AcceptFilter http none
#AcceptFilter https none
============ [END] httpready accept filter problem solution ==============

Adding to /boot/loader.conf will make the change permanent, but if you fancy testing this change out without rebooting your system, you can run this: -

# kldload accf_http

You can see that it’s been loaded by doing: -

# kldstat
Id Refs Address Size Name
1 5 0xc0400000 6f6544 kernel
2 1 0xc41f6000 2000 accf_http.ko <-- you just loaded this module!

You can now restart Apache and see that your previous error is no longer.

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