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Date: Sun, 04 Apr 2010 17:05:13 +0300
From: Alex S Kurilo <kamazee@gmail.com>
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Subject: [users@httpd] Reload kills apache

Apache's processes disappear after `apache2ctl graceful` with the 
following lines in errorlog:

[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed
[Sun Apr 04 17:38:25 2010] [error] (4)Interrupted system call: waitpid() 
failed

I have no experience in debugging so I hope to get some help here :)
What should I do to get more detailed information about the reason of fails?


# apache2 -v
Server version: Apache/2.2.9 (Debian)
Server built:   Nov 15 2009 11:32:50

# apache2 -t -D DUMP_MODULES
Loaded Modules:
core_module (static)
  log_config_module (static)
  logio_module (static)
  mpm_itk_module (static) # <- (!)
  http_module (static)
  so_module (static)
  alias_module (shared)
  auth_basic_module (shared)
  authn_file_module (shared)
  authz_default_module (shared)
  authz_groupfile_module (shared)
  authz_host_module (shared)
  authz_user_module (shared)
  autoindex_module (shared)
  deflate_module (shared)
  dir_module (shared)
  env_module (shared)
  include_module (shared)
  mime_module (shared)
  negotiation_module (shared)
  php5_module (shared)
  rewrite_module (shared)
  setenvif_module (shared)


There is a one more weird thing with Linux kernel. I use Debian Lenny, 
but uname shows 2.6.33 kernel.

# uname -a
Linux (hostname here) 2.6.33 #1 SMP Thu Feb 25 21:13:55 MSK 2010 x86_64 
GNU/Linux

# dpkg -l | grep linux-image
ii  linux-image-2.6-amd64               2.6.26+17+lenny1         Linux 
2.6 image on AMD64
ii  linux-image-2.6.26-2-amd64          2.6.26-21lenny4          Linux 
2.6.26 image on AMD64

I think hosting company rebuilt a kernel and installed their custom one 
on my server so that could be the reason of waitpid() fails and a dozen 
of segmentation faults, but this thesis should be proven before blaming 
them :)

Thanks in advance.

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