Re: PHP and mod_fcgid: ap_pass_brigade failed in handle_request

I would set it to a value that is the upper bound of your responses' size (it might already be the case, please check /proc/sys/net/ipv4/tcp_wmem). This should avoid blocking fcgid's while flushing data due to slow external clients, avoiding also weird timeouts set in the response processing chain. The httpd's sockets should be instructed to use SO_SNDBUF so remember to tune the TCP stack accordingly.

This is probably not the solution but it might be a good try to narrow down the root cause of the issue.

Let me know!

Luca

2015-12-10 18:09 GMT+01:00 Steven Barre <steven@xxxxxxxxxxxxxxxxxxxxxxxx>:

I haven't yet been able to determine a pattern of when it happens. It seems to be all kinds of requests (for PHP pages) that is causing it. We even have a few different CMSs and they are all doing it, so I don't think its a PHP code issue.

What would you recommend I set SendBufferSize to? Its currently not set in my configs and so is the default.

================================================= Steven Barre, RHCE steven@xxxxxxxxxxxxxxxxxxxxxxxx Systems Administrator Real Estate Webmasters - 250-753-9893 ==================================================

On 2015-12-10 07:52, Luca Toscano wrote:

Hi Steven,

from [1] it appears that something goes wrong when flushing data to the output filters chain. Does it happen with a specific set of requests or randomly?

Shot in the dark: have you also tried to increase the Apache SendBufferSize (https://httpd.apache.org/docs/2.4/mod/mpm_common.html#sendbuffersize)?

Luca

[1]: https://github.com/xyntrix/mod_fcgid/blob/98e699ccc94ec74886504b40b7703d7282bccd60/modules/fcgid/fcgid_bridge.c#L403

2015-12-07 19:24 GMT+01:00 Steven Barre <steven@xxxxxxxxxxxxxxxxxxxxxxxx>:

OK, so I've been trying to solve this for a while now,. and I still can't even figure out what this error means. Can someone tell me what has gone wrong in fcgi to cause this error?

I posted on Stack Overflow, but haven't gotten much help yet so I'm trying this mailing list. http://stackoverflow.com/questions/33811543/php-and-mod-fcgid-ap-pass-brigade-failed-in-handle-request-ipc-function

========================================

This has been asked and answered before http://stackoverflow.com/a/12686252/219116 but, the solution there is not working for me.

mod_fcgid config

<IfModule mod_fcgid.c>
AddHandler fcgid-script .fcgi
FcgidIPCDir /var/run/mod_fcgid/
FcgidProcessTableFile /var/run/mod_fcgid/fcgid_shm

FcgidIdleTimeout 60
FcgidProcessLifeTime 120
FcgidMaxRequestsPerProcess 500
FcgidMaxProcesses 150
FcgidMaxProcessesPerClass 144
FcgidMinProcessesPerClass 0
FcgidConnectTimeout 30
FcgidIOTimeout 600
FcgidIdleScanInterval 10
FcgidMaxRequestLen 269484032

</IfModule>

php-cgi script

#!/bin/bassh
export PHPRC=/var/www/vhosts/example.com/etc/
export PHP_FCGI_MAX_REQUESTS=5000
exec /usr/bin/php-cgi

System details

- CentOS Linux release 7.1.1503 (Core)
- httpd-2.4.6-31.el7.centos.x86_64
- mod_fcgid-2.3.9-4.el7.x86_64
- php56u-cli-5.6.12-1.ius.centos7.x86_64

So my FcgidMaxRequestsPerProcess is set to 500 and my PHP_FCGI_MAX_REQUESTS is set to 10x that as suggested in the previous answers and the Apache documentation. And yet I still get these errors

[Thu Nov 19 18:16:48.197238 2015] [fcgid:warn] [pid 6468:tid 139726677858048]
(32)Broken pipe: [client X.X.X.X:41098] mod_fcgid: ap_pass_brigade failed in handle_request_ipc function

--
=================================================
Steven Barre, RHCE
steven@xxxxxxxxxxxxxxxxxxxxxxxx

Systems Administrator
Real Estate Webmasters - 250-753-9893
==================================================

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Re: PHP and mod_fcgid: ap_pass_brigade failed in handle_request_ipc function