BUG: Receiving application bug warnings from SYSLOG in Redhat AS 3

When running motion as daemon, I am getting application bug warnings emitted from SYSLOG an Redhat AS 3. The error is as follows.

Oct 26 08:43:43 localhost kernel: application bug: motion(13593) has SIGCHLD set to SIG_IGN but calls wait().
Oct 26 08:43:43 localhost kernel: (see the NOTES section of 'man 2 wait'). Workaround activated.

Here are the results of the following commands.

[root@localhost motion]# rpm -qa curl xmlrpc-c ffmpeg mysql postgresql
xmlrpc-c-0.9.9-1
mysql-3.23.58-2.3
curl-7.10.6-4.1
ffmpeg-0.4.8-3.1.fc2.fr
[root@localhost motion]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 3 (Taroon Update 3)
[root@localhost motion]# cat /proc/version
Linux version 2.4.21-20.ELsmp (bhcompile@tweety.build.redhat.com) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-42)) #1 SMP Wed Aug 18 20:46:40 EDT 2004

Test case

Setup motion to run as a daemon on Redhat AS 3. Setup SYSLOG to emit to a file. View the SYSLOG log file after running motion as a daemon.

Environment

Motion version:	3.1.17
Shared libraries:	curl, xmlrpc, ffmpeg, mysql, postgresql
Server OS:	Redhat AS 3

-- PeterS - 26 Oct 2004

Follow up

This is an old known problem and I believe it is only visible in certain 2.4 kernel versions from Red Hat.

I am curious about one thing. Does this problem happen with the experimental release I made last night? There is code related to Berkeley encoding that is removed and it contained the only wait() in the entire code.

Get it here: http://www.lavrsen.dk/twiki/bin/view/Motion/MotionRelease3x1x18snap2

There is an extra patch file attached. You do not need it to do the test. It does not harm either. It just makes the example motion-dist.conf more complete.

-- KennethLavrsen - 26 Oct 2004

Follow up

I am now using the version you reference above but am still receiving the message.

Nov  2 16:35:06 localhost motion: Processing thread 0 - config file /etc/motion/motion.conf
Nov  2 16:35:06 localhost motion: Unknown config option: "mpeg_encode"
Nov  2 16:35:06 localhost motion: Unknown config option: "mpeg_encode_bin"
Nov  2 16:35:06 localhost motion: Unknown config option: "adjust_rate"
Nov  2 16:35:06 localhost motion: Unknown config option: "jpg_cleanup"
Nov  2 16:35:06 localhost motion: Unknown config option: "berkeley_single_directory"
Nov  2 16:35:06 localhost motion: Unknown config option: "sql_log_image"
Nov  2 16:35:06 localhost motion: Unknown config option: "sql_log_snapshot"
Nov  2 16:35:06 localhost motion: Unknown config option: "sql_log_mpeg"
Nov  2 16:35:06 localhost motion: Unknown config option: "sql_log_timelapse"
Nov  2 16:35:06 localhost motion: Unknown config option: "sql_log_prediction"
Nov  2 16:35:06 localhost motion: Processing thread 1 - config file /etc/motion/cam1.conf
Nov  2 16:35:06 localhost motion: Processing thread 2 - config file /etc/motion/cam2.conf
Nov  2 16:35:06 localhost motion: Processing thread 3 - config file /etc/motion/cam3.conf
Nov  2 16:35:06 localhost motion: Processing thread 4 - config file /etc/motion/cam4.conf
Nov  2 16:35:06 localhost motion: motion running as daemon process
Nov  2 16:35:06 localhost kernel: application bug: motion(9247) has SIGCHLD set to SIG_IGN but calls wait().
Nov  2 16:35:06 localhost kernel: (see the NOTES section of 'man 2 wait'). Workaround activated.
Nov  2 16:36:06 localhost kernel: application bug: motion(9250) has SIGCHLD set to SIG_IGN but calls wait().
Nov  2 16:36:06 localhost kernel: (see the NOTES section of 'man 2 wait'). Workaround activated.

-- PeterS - 02 Nov 2004

Fix Record

A change of signal handling has been implemented which should eliminate this bug. Please confirm that MotionRelease3x1x18snap10 no longer produces the warning.

-- KennethLavrsen - 15 Jan 2005