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Old 07-17-2008, 06:48 AM   #1
rvbalraj
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Registered: Feb 2007
Posts: 7

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exit signal Bus error (7)


HI All,

We have been dedicated server. In that the following error has been creating Its making severe issue Please help me to resolve this issue.

#grep 'exit signal Bus' error_log

[Wed Jul 16 21:18:45 2008] [notice] child pid 19433 exit signal Bus error (7)
[Wed Jul 16 22:12:56 2008] [notice] child pid 22194 exit signal Bus error (7)
[Wed Jul 16 23:08:53 2008] [notice] child pid 31096 exit signal Bus error (7)
[Wed Jul 16 23:30:29 2008] [notice] child pid 1139 exit signal Bus error (7)
[Thu Jul 17 00:09:58 2008] [notice] child pid 3336 exit signal Bus error (7)
[Thu Jul 17 00:28:03 2008] [notice] child pid 6256 exit signal Bus error (7)
[Thu Jul 17 00:53:55 2008] [notice] child pid 7459 exit signal Bus error (7)


Memory and Hardware test passed (DC people checked). Reload RHEL4 OS with 64 bit.

Server Details:
CPU : Intel(R) Xeon(R) CPU X3210 @ 2.13GHz (4 CPU)
CPU MHz: 2133.413

RAM : 4 GB
Apache : 2.0 (Previously tested with 2.2.9)
PHP : 5.2.5
MySQL : 5.0.1 (Running separate box)


Current Apache 2.0 Settings:

KeepAlive On
MaxKeepAliveRequests 0
KeepAliveTimeout 5
UseCanonicalName Off
<IfModule prefork.c>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
ServerLimit 2000
MaxClients 2000
MaxRequestsPerChild 0
</IfModule>

Previous Apache Settings:
(Tried with below apache settings on that time also the signal bus error created )

Apache 2.2.9 with eAccelerator compailed.

KeepAlive Off
MaxKeepAliveRequests 50
KeepAliveTimeout 10
UseCanonicalName Off
<IfModule prefork.c>
StartServers 16
MinSpareServers 8
MaxSpareServers 64
ServerLimit 500
MaxClients 500
MaxRequestsPerChild 10000
</IfModule>

Compiled in modules:
core.c
mod_access.c
mod_auth.c
mod_include.c
mod_log_config.c
mod_logio.c
mod_env.c
mod_expires.c
mod_headers.c
mod_unique_id.c
mod_setenvif.c
mod_proxy.c
proxy_connect.c
proxy_ftp.c
proxy_http.c
mod_ssl.c
prefork.c
http_core.c
mod_mime.c
mod_status.c
mod_autoindex.c
mod_asis.c
mod_info.c
mod_suexec.c
mod_cgi.c
mod_negotiation.c
mod_dir.c
mod_imap.c
mod_actions.c
mod_userdir.c
mod_alias.c
mod_rewrite.c
mod_so.c

Apache Server compiled with....
-D APACHE_MPM_DIR="server/mpm/prefork"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D HTTPD_ROOT="/usr/local/apache"
-D SUEXEC_BIN="/usr/local/apache/bin/suexec"
-D DEFAULT_PIDLOG="logs/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="logs/accept.lock"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"

Running single website with drupal based flash arcade website. Per day 2500 visitors and 150 users online normally.

I am almost 3 weeks to resolve this issue. Please help me to resolve this..
 
Old 07-18-2008, 12:19 AM   #2
Mr. C.
Senior Member
 
Registered: Jun 2008
Posts: 2,529

Rep: Reputation: 59
Memory and hardware problems would cause crashes and corruption in random applications, not the same application in the same way over and over.

You're going to need to get a core dump from apache; it appears it might be php causing an apache worker to exit unexpectedly. Enable coredumps and the next time the crash occurs, a core file will be dump, which can be examined with gdb. This will give a stack backtrace, helping to identify the area of crash.

Once confirmed that it is PHP, submit your bug to http://bugs.php.net/ and someone should respond.
 
  


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