fastcgi incomplete headers issues

[robmorin]

I know this has been on here before, but its seems to be a difficult issue to pin down....

I am moving users/websites from vhcs2 over to Omega on a different server, and so far 50% of the sites break due to fastcgi errors problems permissions, whatever....

Is there a way to debug fastcgi to give more info when something does not work.... i always get the same errors, but never know what it might be, sometimes perms , sometimes its something else but the error stays the same.....

[Thu Nov 08 08:35:21 2007] [error] [client xxx.xxx.xxx.146] FastCGI: incomplete headers (0 bytes) received from server "/var/www/fcgi/domain.com/php4-fcgi-starter", referer: http://www.domain.com/index_m.htm

Its driving me nuts....
I have to migrate over 150 websites, so far i have done 8 and 5 of them had issues....

Can someone please let me know if i can do something to increase debugging for errors like these, or explain to me what that error indicates exactly...

here are perms for this site....
/var/www/virtual/domain.com/
drwxrwx--- 10 vu2057 www-data 4096 2007-02-21 09:29 .
drwxr-xr-x 121 vu2000 www-data 4096 2007-11-03 07:35 ..
drwxr-x--- 2 vu2057 www-data 4096 2006-10-20 09:02 backups
drwxr-x--x 2 vu2057 vu2057 4096 2006-10-20 09:02 cgi-bin
drwxr-xr-x 3 vu2057 www-data 4096 2007-02-21 09:30 chat
drwxr-xr-x 7 vu2057 vu2057 4096 2006-10-20 09:02 errors
drwxrwxrwx 8 vu2057 www-data 4096 2007-01-15 19:09 g2data
drwxr-xr-x 6 vu2057 vu2057 4096 2007-02-21 09:35 htdocs
-rw-rw---- 1 vu2057 www-data 1 2006-10-20 09:02 .htgroup
-rw-rw---- 1 vu2057 www-data 1 2006-10-20 09:02 .htpasswd
drwxr-xr-x 2 vu2057 www-data 4096 2006-10-20 09:02 logs
drwxr-xr-x 18 vu2057 www-data 4096 2007-11-02 13:46 phptmp

/var/www/fcgi/domain.com
drwxr-xr-x 4 vu2057 vu2057 4096 2007-10-23 14:38 .
drwxr-xr-x 122 root root 4096 2007-10-30 09:57 ..
drwxr-x--- 2 vu2057 vu2057 4096 2007-10-23 14:38 php4
-rwxr-x--- 1 vu2057 vu2057 203 2007-11-02 16:20 php4-fcgi-starter
drwxr-x--- 2 vu2057 vu2057 4096 2007-10-23 14:38 php5
-rwxr-x--- 1 vu2057 vu2057 203 2007-10-23 14:38 php5-fcgi-starter

Any help appreciated

everybody have a great day!

Rob..

[achioo]

I don't think that the incomplete headers issue is related to permissions. I am also getting the incomplete headers error though.

[ephigenie]

pls have a look in your /var/log/apache2/suexec.log.

suexec is very picky about permissions - and those fastcgi problems are mostly because of wrong permissions of starter dirs & files.

One Problem is see is that the starter needs to be readable by www-data to start it.
x alone is not enough AFAIK.

[robmorin]

All i see is this is this in the log

[2007-11-08 09:47:58]: uid: (vu2057/vu2057) gid: (2057/2057) cmd: php4-fcgi-starter
[2007-11-08 09:50:57]: uid: (vu2057/vu2057) gid: (2057/2057) cmd: php4-fcgi-starter
[2007-11-08 09:51:07]: uid: (vu2057/vu2057) gid: (2057/2057) cmd: php4-fcgi-starter

?? anything else?

ephigenie Wrote:pls have a look in your /var/log/apache2/suexec.log.

suexec is very picky about permissions - and those fastcgi problems are mostly because of wrong permissions of starter dirs & files.

One Problem is see is that the starter needs to be readable by www-data to start it.
x alone is not enough AFAIK.

[ephigenie]

what happens if you try to exec a php script via

sudo -u vu2057 php4-cgi -f /path/to/your/php/index/or/whatever.php

[robmorin]

BTW i just had a client call up, and he has the same issue where he sees error 500 via his web browser and in the error logs i see the same incomplete headers, however it seems to work sometimes and sometimes not, a refresh will sometimes make it work.... the only thing i see in common with these websites is that they use mysql... one client mentioned that he might think it is a mysql connection problem??? this is just speculation at this point...

OK i ran the sudo command and i see the php file run by... i get no errors or anything.... thats good i hope..

i ran ...
sudo -u vu2055 php4-cgi -f EBLASTS/new_staff_mc/eblast.php

and saw html output from the file... however via the web same thing error 500

Thanks for your help.... anything
else i should do?

Rob...

ephigenie Wrote:what happens if you try to exec a php script via

sudo -u vu2057 php4-cgi -f /path/to/your/php/index/or/whatever.php

[robmorin]

WAIT..

i do actually see this in the output of that fiel i missed it before... not sure if its cause for alarm....

<b>Warning</b>: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cookie - headers already sent in <b>/var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php</b> on line <b>2</b><br />
<br />
<b>Warning</b>: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php:2) in <b>/var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php</b> on line <b>2</b><br />

robmorin Wrote:BTW i just had a client call up, and he has the same issue where he sees error 500 via his web browser and in the error logs i see the same incomplete headers, however it seems to work sometimes and sometimes not, a refresh will sometimes make it work.... the only thing i see in common with these websites is that they use mysql... one client mentioned that he might think it is a mysql connection problem??? this is just speculation at this point...

OK i ran the sudo command and i see the php file run by... i get no errors or anything.... thats good i hope..

i ran ...
sudo -u vu2055 php4-cgi -f EBLASTS/new_staff_mc/eblast.php

and saw html output from the file... however via the web same thing error 500

Thanks for your help.... anything
else i should do?

Rob...

ephigenie Wrote:what happens if you try to exec a php script via

sudo -u vu2057 php4-cgi -f /path/to/your/php/index/or/whatever.php

[robmorin]

Oddly enough after tweaking mysql like this... some of the errors went away.... however i still have one website that gets this in his gallery2 application... but it only happens once out of 6 or 7 times..

Could it be an eAccelerator thing? i do not think so....
?
Error in apache log file, nothing interesting in suexce.log file

[Thu Nov 08 12:46:09 2007] [error] [client 64.86.63.146] FastCGI: incomplete headers (0 bytes) received from server "/var/www/fcgi/domain.com/php4-fcgi-starter", referer: http://www.domain.com/MD/modules/gallery...itemId=320

Added the 2 below options...
read_buffer_size = 2M
join_buffer_size = 2M

Doubled the 2 below options
query_cache_limit = 2M
query_cache_size = 32M

doubled this
table_cache = 4200

doubled this
max_connections = 200

Any ideas.....

robmorin Wrote:WAIT..

i do actually see this in the output of that file i missed it before... not sure if its cause for alarm....

<b>Warning</b>: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cookie - headers already sent in <b>/var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php</b> on line <b>2</b><br />
<br />
<b>Warning</b>: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php:2) in <b>/var/www/virtual/domain.com/htdocs/EBLASTS/new_staff_mc/config.php</b> on line <b>2</b><br />

robmorin Wrote:BTW i just had a client call up, and he has the same issue where he sees error 500 via his web browser and in the error logs i see the same incomplete headers, however it seems to work sometimes and sometimes not, a refresh will sometimes make it work.... the only thing i see in common with these websites is that they use mysql... one client mentioned that he might think it is a mysql connection problem??? this is just speculation at this point...

OK i ran the sudo command and i see the php file run by... i get no errors or anything.... thats good i hope..

i ran ...
sudo -u vu2055 php4-cgi -f EBLASTS/new_staff_mc/eblast.php

and saw html output from the file... however via the web same thing error 500

Thanks for your help.... anything
else i should do?

Rob...

ephigenie Wrote:what happens if you try to exec a php script via

sudo -u vu2057 php4-cgi -f /path/to/your/php/index/or/whatever.php

[ephigenie]

if you've heavy traffic sites, it helps to increase the FCGI_CHILDREN in the php[4,5]-fcgi-starter from 2 to something like 4 - or even higher.

In Addition there're quiet a lot options for mod_fastcgi pls use the search function in here - you'll find a lot about that topic ...

[robmorin]

ok i will look around thanks for the tip!

Have a great day/evening!

Rob..

ephigenie Wrote:if you've heavy traffic sites, it helps to increase the FCGI_CHILDREN in the php[4,5]-fcgi-starter from 2 to something like 4 - or even higher.

In Addition there're quiet a lot options for mod_fastcgi pls use the search function in here - you'll find a lot about that topic ...