Hi everybody.
I have a problem on a production cluster with a somewhat big mod_perl
app, and I just cannot get any clue of what is happening.
The problem is that the servers just exit with Segmentation fault
randomly.
The problem is rare, hapens 10/20 times each day in each of the 6
frontends, which globaly processes about 1.000.000 daily hits.
The global stats show about 30 Internal server errors daily, I don't
know if a segfault can cause an Internal Server Error on the client (I
suppose not, if the server dies, cannot send the 505), but the numbers
don't match anyway.
I think a coredump will help me understand why it segfaults, but I don't
know how to make apache dump a coredump, I've tried a lot of recipes
found on internet with any success. Making things more complicated, this
problems only happens on the production systems, (Suppose only on some
pages...) so I cannot reproduce it on my test system.
So, my question is... There is any way to force apache to dump a
coredump file? I suppose I'm forgotting something but I really
desperate...
A secondary question is, some of the servers transforms all UTF8 strings
with "garbage" when some Segfault happens (Seems like double-encoded
UTF8, the page shows 3 or 4 chars for every UTF8 char...). The only way
to solve this is reboot the machine completely.
Is that related to this same problem? Or is an obscure UTF8 perl/Apache
problem?
Many thanks,
I'm using mod_perl 1.29 with apache 1.3.31.
My perl conf:
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
Platform:
osname=linux, osvers=2.4.20-2.48smp,
archname=i386-linux-thread-multi
uname='linux str'
config_args='-des -Doptimize=-O2 -march=i386 -mcpu=i686 -g
-Dmyhostname=localhost [EMAIL PROTECTED] -Dcc=gcc -Dcf_by=Red
Hat, Inc. -Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux
-Dvendorprefix=/usr -Dsiteprefix=/usr
-Dotherlibdirs=/usr/lib/perl5/5.8.0 -Duseshrplib -Dusethreads
-Duseithreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db
-Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
-Dinstallusrbinperl -Ubincompat5005 -Uversiononly -Dpager=/usr/bin/less
-isr'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef'
useithreads=define usemultiplicity=
useperlio= d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=un uselongdouble=
usemymalloc=, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-DDEBUGGING -fno-strict-aliasing -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
optimize='',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBUGGING
-fno-strict-aliasing -I/usr/local/include -I/usr/include/gdbm'
ccversion='', gccversion='3.2.2 20030213 (Red Hat Linux 8.0
3.2.2-1)', gccosandvers=''
gccversion='3.2.2 200302'
intsize=e, longsize= , ptrsize=p, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long'
k', ivsize=4'
ivtype='long'
known_ext, nvtype='double'
o_nonbl', nvsize=, Off_t='', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='gcc'
l', ldflags =' -L/usr/local/lib'
ldf'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -lgdbm -ldb -ldl -lm -lpthread -lc -lcrypt -lutil
perllibs=
libc=/lib/libc-2.3.1.so, so=so, useshrplib=true, libperl=libper
gnulibc_version='2.3.1'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so', d_dlsymun=undef, ccdlflags='-rdynamic
-Wl,-rpath,/usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE'
cccdlflags='-fPIC'
ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5', lddlflags='s
Unicode/Normalize XS/A'
Characteristics of this binary (from libperl):
Compile-time options: DEBUGGING MULTIPLICITY USE_ITHREADS
USE_LARGE_FILES PERL_IMPLICIT_CONTEXT
Locally applied patches:
MAINT18379
Built under linux
Compiled at Feb 18 2003 22:19:53
%ENV:
PERL5LIB="/usr/eBD/perl"
@INC:
/usr/eBD/perl/i386-linux-thread-multi
/usr/eBD/perl
/usr/lib/perl5/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/5.8.0
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.0
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.0
/usr/lib/perl5/vendor_perl
/usr/lib/perl5/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/5.8.0
--
Report problems: http://perl.apache.org/bugs/
Mail list info: http://perl.apache.org/maillist/modperl.html
List etiquette: http://perl.apache.org/maillist/email-etiquette.html
