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From Eric Aarts <>
Subject [mp2] in production-environment generates 'oh Crap, server dumped core' messages. When / why is active?
Date Sun, 05 Jan 2014 17:08:38 GMT
1. Problem Description:

On our new Ubuntu 12.04.3 LTS server (LAMP) I have successfully installed
mod_perl (with apt-get) and it seems to be running OK.
Our webbased ERP-package is running with mod_perl on several Ubuntu servers
without any problem (up from Ubuntu 8.04).
This server shows in the '/var/log/apache2/error.log'-file many lines like:
[  error] oh Shucks, server dumped core
[  error] oh Dangit, server dumped core
[  error] oh Crap, server dumped core
[  error] oh Gosh, server dumped core
[  error] oh Dangit, server dumped core
[  error] oh Dangnabit, server dumped core
Around 40 of these messages per hour, only when user are active on the
server with Apache2/Mod_Perl.

We have not seen these on other servers.
I traced this to '/usr/lib/perl5/Apache/' (I altered shucks to
Shucks...) and commented 2 lines to prevent these messages.

My questions are:
(1) Why is a function in active? Seems to me TestRun is for
testing? Or when you compile from source?
(2) Are these messages meant seriously?
(3) When we upgrade to 14.04 (whith a newer mod_perl version), is this


2. Used Components and their Configuration:

sysop@mars:/tmp$  lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.3 LTS
Release:        12.04
Codename:       precise

*** mod_perl version 2.000005

*** using /usr/lib/perl5/Apache2/

*** Makefile.PL options:
  MP_APR_LIB     => aprext
  MP_APXS        => /usr/bin/apxs2
  MP_CCOPTS      => -g -O2 -fstack-protector --param=ssp-buffer-size=4
-Wformat -Wformat-security -Wall
  MP_COMPAT_1X   => 1
  MP_INCLUDE_DIR => /usr/include/apache2 /usr/include/apr-1.0
  MP_LIBNAME     => mod_perl
  MP_TRACE       => 0
  MP_USE_DSO     => 1
  MP_USE_GTOP    => 1

*** The httpd binary was not found

*** (apr|apu)-config linking info

(apr|apu)-config scripts were not found

*** /usr/bin/perl -V
Summary of my perl5 (revision 5 version 14 subversion 2) configuration:

    osname=linux, osvers=2.6.42-37-generic,
    uname='linux batsu 2.6.42-37-generic #58-ubuntu smp thu jan 24 15:28:10
utc 2013 x86_64 x86_64 x86_64 gnulinux '
    config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.14 -Darchlib=/usr/lib/perl/5.14
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitearch=/usr/local/lib/perl/5.14.2 -Dman1dir=/usr/share/man/man1
-Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1
-Dsiteman3dir=/usr/local/man/man3 -Duse64bitint -Dman1ext=1 -Dman3ext=3perl
-Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm
-Ui_libutil -DDEBUGGING=-g -Doptimize=-O2 -Duseshrplib -des'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include
    optimize='-O2 -g',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fno-strict-aliasing
-pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.6.3', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib/x86_64-linux-gnu /lib/../lib
/usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib
    libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
    perllibs=-ldl -lm -lpthread -lc -lcrypt
    libc=, so=so, useshrplib=true,
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib

Characteristics of this binary (from libperl):
                        PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT
  Locally applied patches:
        DEBPKG:debian/arm_thread_stress_timeout - Raise the timeout of
ext/threads/shared/t/stress.t to accommodate slower build hosts
        DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS
default for modules installed from CPAN.
        DEBPKG:debian/db_file_ver - Remove
overly restrictive DB_File version check.
        DEBPKG:debian/doc_info - Replace generic man(1) instructions with
Debian-specific information.
        DEBPKG:debian/enc2xs_inc - Tweak
enc2xs to follow symlinks and ignore missing @INC directories.
        DEBPKG:debian/errno_ver - Remove
Errno version check due to upgrade problems with long-running processes.
        DEBPKG:debian/libperl_embed_doc - that libperl-dev package is required
for embedded linking
        DEBPKG:fixes/respect_umask - Respect umask during installation
        DEBPKG:debian/writable_site_dirs - Set umask approproately for site
install directories
        DEBPKG:debian/extutils_set_libperl_path - EU:MM: Set location of
libperl.a to /usr/lib
        DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or
perllocal.pod for perl or vendor
        DEBPKG:debian/prefix_changes - Fiddle with *PREFIX and variables
written to the makefile
        DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to the
binary targets.
        DEBPKG:debian/instmodsh_doc - Debian policy doesn't install
.packlist files for core or vendor.
        DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH
as per Debian policy.
        DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to
/etc/perl/Net as /usr may not be writable.
        DEBPKG:debian/m68k_thread_stress - Disable some threads tests on m68k for now
due to missing TLS.
        DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
        DEBPKG:debian/module_build_man_extensions - Adjust Module::Build manual page extensions
for the Debian Perl policy
        DEBPKG:debian/prune_libs - Prune the
list of libraries wanted to what we actually need.
        DEBPKG:fixes/net_smtp_docs - [ #36038] Document the Net::SMTP 'Port' option
        DEBPKG:debian/perlivp - Make perlivp
skip include directories in /usr/local
        DEBPKG:debian/disable-zlib-bundling - Disable zlib bundling in
        DEBPKG:debian/cpanplus_definstalldirs - Configure CPANPLUS to use the site
directories by default.
        DEBPKG:debian/cpanplus_config_path - Save local versions of
CPANPLUS::Config::System into /etc/perl.
        DEBPKG:debian/deprecate-with-apt - users to Debian packages of
deprecated core modules
        DEBPKG:fixes/hurd-ccflags - [a190e64][perl #92244] Make hints/ append to
$ccflags rather than overriding
        DEBPKG:debian/squelch-locale-warnings - Squelch locale warnings in Debian package
maintainer scripts
        DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the
upstream Git repository
        DEBPKG:fixes/extutils-cbuilder-cflags - [011e8fb] [perl #89478] Append CFLAGS and LDFLAGS to
their counterparts in EU::CBuilder
        DEBPKG:fixes/module-build-home-directory - [ #67893] Fix failing tilde test
when run under a UID without a passwd entry
        DEBPKG:debian/patchlevel - List
packaged patches for 5.14.2-6ubuntu2.3 in patchlevel.h
        DEBPKG:fixes/h2ph-multiarch - [e7ec705] [perl #90122] Make h2ph correctly search gcc
include directories
        DEBPKG:fixes/index-tainting - [3b36395] [perl #64804] RT 64804: tainting with index()
of a constant
        DEBPKG:debian/skip-kfreebsd-crash -[perl #96272] Skip a crashing test case
in t/op/threads.t on GNU/kFreeBSD
        DEBPKG:fixes/document_makemaker_ccflags - [ #68613] Document that CCFLAGS
should include $Config{ccflags}
        DEBPKG:fixes/sys-syslog-socket-timeout-kfreebsd.patch - [ #69997] Use a socket timeout on
GNU/kFreeBSD to catch ICMP port unreachable messages
        DEBPKG:fixes/hurd-hints - Improve
general GNU hints, needed for GNU/Hurd.
        DEBPKG:fixes/pod_fixes - [7698aed] typos in several pod/perl*.pod files
        DEBPKG:debian/find_html2text - CPAN::Distribution with correct
name of html2text
        DEBPKG:fixes/digest_eval_hole - Close
the eval "require $module" security hole in Digest->new($algorithm)
        DEBPKG:fixes/hurd-ndbm - [f0d0a20] [perl #102680] Add GNU/Hurd hints for NDBM_File
        DEBPKG:fixes/sysconf.t-posix - [8040185] [perl #102888] Fix hang in ext/POSIX/t/sysconf.t on GNU/Hurd
        DEBPKG:fixes/hurd-largefile - [1fda587] [perl #103014] enable LFS on GNU/Hurd
        DEBPKG:debian/hurd_test_todo_syslog - failing GNU/Hurd tests in
        DEBPKG:fixes/hurd_skip_itimer_virtual - [ #72754] Skip interval timer tests in Time::HiRes on
        DEBPKG:debian/hurd_test_skip_socketpair - Disable failing GNU/Hurd tests
        DEBPKG:debian/hurd_test_skip_sigdispatch - Disable failing GNU/Hurd tests
        DEBPKG:debian/hurd_test_skip_stack - failing GNU/Hurd tests
        DEBPKG:debian/hurd_test_skip_recv - failing GNU/Hurd tests
        DEBPKG:debian/hurd_test_skip_libc - failing GNU/Hurd tests
        DEBPKG:debian/hurd_test_skip_pipe - failing GNU/Hurd tests io/pipe.t
        DEBPKG:debian/hurd_test_skip_io_pipe - failing GNU/Hurd tests
        DEBPKG:fixes/CVE-2012-5195 - avoid calling memset with a negative
        DEBPKG:fixes/CVE-2012-5526 - [PATCH 1/4] CR escaping for P3P header
        DEBPKG:CVE-2013-1667.patch - [PATCH] Prevent premature hsplit()
calls, and only trigger REHASH after hsplit()
  Built under linux
  Compiled at Mar 18 2013 19:17:55

*** Packages of interest status:

Apache2            : -
Apache2::Request   : -
CGI                : 3.52
ExtUtils::MakeMaker: 6.57_05
LWP                : 6.03
mod_perl           : -
mod_perl2          : 2.000005

3. This is the core dump trace: (if you get a core dump):


This report was generated by /usr/share/libapache2-mod-perl2/mp2bug on Sun
Jan  5 16:45:23 2014 GMT.

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