Subject: pkg/26347: ap2-python has problems creating global mutex
To: None <>
From: None <>
List: pkgsrc-bugs
Date: 07/16/2004 21:29:54
>Number:         26347
>Category:       pkg
>Synopsis:       <p2-python has problems creating global mutex
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 17 01:30:00 UTC 2004
>Originator:     D'Arcy J.M. Cain
>Release:        NetBSD 2.0F
D'Arcy J.M. Cain <>
The NetBSD Project
System: NetBSD 2.0F NetBSD 2.0F (DRUID) #0: Sun Jun 20 06:19:19 EDT 2004 i386
Architecture: i386
Machine: i386
	When you use this package it gives errors like the following:

	[Tue Jun 01 00:58:27 2004] [notice] mod_python: Creating 32 session mutexes based on 150 max processes and 0 max threads.
	[Tue Jun 01 00:58:27 2004] [error] (23)Too many open files in system: mod_python: Failed to create global mutex 26 of 32 (/tmp/mpmtx843926).
	[Tue Jun 01 00:58:27 2004] [error] mod_python: We can probably continue, but with diminished ability to process session locks.
	[Tue Jun 01 00:58:27 2004] [error] mod_python: Hint: On Linux, the problem may be the number of available semaphores, check 'sysctl kernel.sem'

It works as long as the number of sessions is kept low enough but that will obviosly be a problem for any serious web server.

	Make sure that the following lines are in your https.conf file:

	MaxClients 250
	LoadModule python_module /usr/pkg/lib/httpd/
	AddType text/html .py
	SetHandler python-program
	PythonHandler mod_python.cgihandler

	This might be more than needed but should certainly trigger the error.
	Unknown.  It seems to be a problem with threads and some system limit
	but I have been unable to identify where to adjust this limit.