[Pkg-nagios-devel] Bug#718248: nsca-client: Random segmentation faults of send_nsca

[Cyril Bouthors]

Package: nsca-client
Version: 2.9.1-2
Severity: important

Hi,

Our NSCA installation has random segmentation faults:

Jul 29 00:33:20 backup8 kernel: [5668958.752572] send_nsca[10854]: segfault
at 7fff2d847000 ip 00000000004014b0 sp 00007fff2d842fd0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:21 backup8 kernel: [5668959.786642] send_nsca[10856]: segfault
at 7fffb1512000 ip 00000000004014b0 sp 00007fffb150ddc0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:20 backup8 kernel: [5668958.752572] send_nsca[10854]: segfault
at 7fff2d847000 ip 00000000004014b0 sp 00007fff2d842fd0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:21 backup8 kernel: [5668959.786642] send_nsca[10856]: segfault
at 7fffb1512000 ip 00000000004014b0 sp 00007fffb150ddc0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:20 backup8 kernel: [5668958.752572] send_nsca[10854]: segfault
at 7fff2d847000 ip 00000000004014b0 sp 00007fff2d842fd0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:21 backup8 kernel: [5668959.786642] send_nsca[10856]: segfault
at 7fffb1512000 ip 00000000004014b0 sp 00007fffb150ddc0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:20 backup8 kernel: [5668958.752572] send_nsca[10854]: segfault
at 7fff2d847000 ip 00000000004014b0 sp 00007fff2d842fd0 error 6 in
send_nsca[400000+5000]
Jul 29 00:33:21 backup8 kernel: [5668959.786642] send_nsca[10856]: segfault
at 7fffb1512000 ip 00000000004014b0 sp 00007fffb150ddc0 error 6 in
send_nsca[400000+5000]

This seems to appear when the system is under extremely heavy I/O, CPU,
memory usage and when send_nsca is called frequently, about 1 time per
second with bursts to probably 20/s.

I can reproduce this issue on at least 3 machines under the same condition
(heavy I/O/CPU/memory usage) under squeeze and wheezy.

On machines with less I/Os, send_nsca is running just fine.

What information would you need from me in order to reproduce and fix this
issue?

Please do not hesitate to ask me for more debug information.

Regards,

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (500, 'oldstable'), (1,
'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages nsca-client depends on:
ii  libc6       2.17-7
ii  libmcrypt4  2.5.8-3.1

nsca-client recommends no packages.

nsca-client suggests no packages.

-- no debconf information
-- 
 ,''`.
: :' :      Cyril Bouthors
`. `'         Debian.org
  `-
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