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1. Problem Description:
The mod-perl enabled server seems to be working ok, but is generating
error messages (every minute) as reported by our system administrators:
The following errors are being reported in /var/log/messages. This problem may have
caused the kernel panic and should be addressed. I copied John Ferreira in case he
may have any inform on signal handling issues with RedHat Linux ES 3.0.
FYI
Jan 23 14:29:34 web1 kernel: application bug: httpd_heavy(3247) has SIGCHLD set to
SIG_IGN but calls wait().
Jan 23 14:29:34 web1 kernel: (see the NOTES section of 'man 2 wait'). Workaround
activated.
Jan 23 14:31:08 web1 kernel: application bug: httpd_heavy(3324) has SIGCHLD set to
SIG_IGN but calls wait().
Jan 23 14:31:08 web1 kernel: (see the NOTES section of 'man 2 wait'). Workaround
activated.
Jan 23 14:33:14 web1 kernel: application bug: httpd_heavy(3248) has SIGCHLD set to
SIG_IGN but calls wait().
Jan 23 14:33:14 web1 kernel: (see the NOTES section of 'man 2 wait'). Workaround
activated.
2. Used Components and their Configuration:
*** mod_perl version 1.9912
*** using /users/webuser/src/mod_perl-1.99_12/lib/Apache/BuildConfig.pm
*** Makefile.PL options:
MP_AP_PREFIX => /users/webuser/apache_heavy
MP_COMPAT_1X => 1
MP_GENERATE_XS => 1
MP_INST_APACHE2 => 1
MP_LIBNAME => mod_perl
MP_USE_DSO => 1
MP_USE_STATIC => 1
*** /users/webuser/apache_heavy/bin/httpd -V
Server version: Apache/2.0.48
Server built: Dec 24 2003 14:36:15
Server's Module Magic Number: 20020903:4
Architecture: 32-bit
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_PROC_PTHREAD_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="/users/webuser/apache_heavy"
-D SUEXEC_BIN="/users/webuser/apache_heavy/bin/suexec"
-D DEFAULT_PIDLOG="logs/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="logs/accept.lock"
-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"
*** /users/webuser/perl/bin/perl -V
Summary of my perl5 (revision 5.0 version 8 subversion 2) configuration:
Platform:
osname=linux, osvers=2.4.21-4.elsmp, archname=i686-linux
uname='linux europa 2.4.21-4.elsmp #1 smp fri oct 3 17:52:56 edt 2003 i686 i686
i386 gnulinux '
config_args='-Dcc=gcc -Dprefix=/users/webuser/perl'
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64',
optimize='-O3',
cppflags='-fno-strict-aliasing -I/usr/local/include'
ccversion='', gccversion='3.2.3 20030502 (Red Hat Linux 3.2.3-20)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='gcc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.3.2.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.3.2'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: USE_LARGE_FILES
Built under linux
Compiled at Dec 18 2003 11:43:19
%ENV:
PERL_LWP_USE_HTTP_10="1"
@INC:
/users/webuser/perl/lib/5.8.2/i686-linux
/users/webuser/perl/lib/5.8.2
/users/webuser/perl/lib/site_perl/5.8.2/i686-linux
/users/webuser/perl/lib/site_perl/5.8.2
/users/webuser/perl/lib/site_perl
.*** Packages of interest status:
Apache::Request: -
CGI : 3.01
LWP : 5.76
mod_perl : 1.9912
3. This is the core dump trace: (if you get a core dump):
[CORE TRACE COMES HERE]
This report was generated by ./REPORT on Tue Jan 27 19:08:48 2004 GMT.
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