Apache2 segfault - 1.3.x branch

**Viktor** · Aug 6th 2016

Hallo,

I become this error on my Test server.

Plugin disabled.
mysql> update plugin set plugin_status = 'disabled', plugin_error = NULL;

Quote

[ERROR] │
│ │
│ Error while performing step: │
│ │
│ Processing setup tasks │
│ │
│ Error was: │
│ │
│ Servers::httpd::apache_php_fpm::start: Could not start the apache2 service: iMSCP::Provider::Service::Sysvinit::_exec: Segmentation fault (core dumped) at │
│ /usr/local/src/imscp-1.3.x/engine/PerlLib/iMSCP/Service.pm line 158. │
│ │
│ Please have a look at http://i-mscp.net/forum if you need help.

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How can I solve this error

Ubuntu 14.04 LTS

Kind regards
Viktor

**Viktor** · Aug 7th 2016

Hallo,

I have found a other error in the syslog.

Aug 7 00:48:28 ubuntu kernel: [1304812.660779] apache2[4760]: segfault at 0 ip 00007f285e27a99a sp 00007fffbccac900 error 4 in mod_socache_shmcb.so[7f285e278000+5000]

Kind regards
Viktor

**Nuxwin** · Aug 7th 2016

@Viktor

We will investigate.

**Nuxwin** · Aug 7th 2016

Confirmed. Relevant backtraces:

Code

root@trusty:/etc/apache2# LANG=C gdb /usr/sbin/apache2 /etc/apache2/core
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
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Reading symbols from /usr/sbin/apache2...Reading symbols from /usr/lib/debug//usr/sbin/apache2...done.
done.
[New LWP 9784]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 socache_shmcb_init (ctx=0x0, namespace=0x7fc64f94574c "authn-socache", hints=0x7fc64fb47010 <authn_cache_hints>, s=0x7fc6522c6f28, p=0x7fc6522ef028) at mod_socache_shmcb.c:344
344 mod_socache_shmcb.c: No such file or directory.
(gdb) thread apply all bt full
Thread 1 (Thread 0x7fc6522f1780 (LWP 9784)):
#0 socache_shmcb_init (ctx=0x0, namespace=0x7fc64f94574c "authn-socache", hints=0x7fc64fb47010 <authn_cache_hints>, s=0x7fc6522c6f28, p=0x7fc6522ef028) at mod_socache_shmcb.c:344
shm_segment = <optimized out>
shm_segsize = <optimized out>
rv = <optimized out>
header = <optimized out>
num_subcache = <optimized out>
num_idx = <optimized out>
loop = <optimized out>
avg_obj_size = <optimized out>
avg_id_len = 140489717477392
#1 0x00007fc64f945505 in authn_cache_post_config (pconf=0x7fc6522ef028, plog=0x7fc6522c3028, ptmp=<optimized out>, s=0x7fc6522c6f28) at mod_authn_socache.c:111
rv = <optimized out>
authn_cache_hints = {avg_id_len = 64, avg_obj_size = 32, expiry_interval = 60000000}
ptmp = <optimized out>
s = 0x7fc6522c6f28
plog = 0x7fc6522c3028
authn_cache_hints = {avg_id_len = 64, avg_obj_size = 32, expiry_interval = 60000000}
#2 0x00007fc6520c1809 in ap_run_post_config (pconf=0x7fc6522ef028, plog=0x7fc6522c3028, ptemp=0x7fc6522c1028, s=0x7fc6522c6f28) at config.c:103
pHook = 0x7fc65220d400
n = 3
rv = 1290247328
#3 0x00007fc6520a1e68 in main (argc=3, argv=0x7ffd561417d8) at main.c:696
c = 0 '\000'
showcompile = 0
showdirectives = 0
confname = 0x7fc6520e1c07 "apache2.conf"
def_server_root = 0x7fc6520e1bfa "/etc/apache2"
temp_error_log = 0x0
error = <optimized out>
process = 0x7fc6522f7118
pconf = 0x7fc6522ef028
plog = 0x7fc6522c3028
ptemp = 0x7fc6522c1028
pcommands = 0x7fc6522cd028
opt = 0x7fc6522cd118
rv = <optimized out>
mod = <optimized out>
opt_arg = 0x7fc6522f7028 "(\260/R\306\177"
signal_server = <optimized out>
(gdb) quit
root@trusty:/etc/apache2#