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Questions tagged [segmentation-fault]

106 questions
24
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6 answers

Can you get any program in Linux to print a stack trace if it segfaults?

If I run a program from the shell, and it segfaults: $ buggy_program Segmentation fault It will tell me, however, is there a way to get programs to print a backtrace, perhaps by running something like this: $ print_backtrace_if_segfault…
Neil
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1 answer

Tuning Apache2 prefork MaxClients ServerLimit

I have a machine with 128 GB Ram that is using Apache2 as Webserver (in this machine there is no Database Server, the Database Machine is a 64 GB Ram machine that can handle 2000 max connections). I see with a monitoring tool that there are at the…
User-N
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1 answer

Why is logrotate causing Apache to seg fault each time?

Every time logrotate runs Apache/2.4.7 (Ubuntu) experiences a seg fault and does not restart: [Wed Sep 10 06:35:54.266018 2014] [mpm_event:notice] [pid 20599:tid 140630283466624] AH00493: SIGUSR1 received. Doing graceful restart [Wed Sep 10…
fpghost
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14
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2 answers

How to get a core dump from apache when segfaulting

I've followed instructions from many locations online on how to get a core dump from apache when it is producing a segfault, but it still refuses to generate the dump. I have: Added the CoreDumpDirectory directive into the httpd.conf file and set…
chrismcb
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11
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3 answers

How to diagnose frequent segfaults

My server is logging frequent segmentation faults to /var/log/kern.log in different tools. So far I've seen them in Perl, PHP and rsync. All installed software is up-to-date Debian packages. Here's an exerpt from the log file: Mar 2 01:07:54 gaz…
Andreas Gohr
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7
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3 answers

segfaults are not logging into /var/log/messages

I'm using Red Hat Enterprise Linux Server release 5. In this whenever a user process crashes due to segmentaion faults, it was not logged in /var/log/messages. Even dmesg is also not showing any messages related to this. Where as in another…
Scy
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6
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1 answer

`ls` causes Segmentation Fault on a specific directory

I used $HOME/.local as prefix to install some applications without root access. There is one directory inside $HOME/.local that I can't execute ls command: [tuananh@server lib]$ ls Segmentation fault [tuananh@server lib]$ cd .. [tuananh@server…
Tuan Anh Hoang-Vu
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5
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1 answer

apache child pid exit signal Segmentation fault (11)

when I installed joomla I can't see the index.php and I get this messages in my /var/log/apache2/error.log [notice] child pid 3211 exit signal Segmentation fault (11) for activate the coredump, I follow the instructions in this link…
JuanPablo
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5
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1 answer

Advice for Debugging Apache with PHP Segmentation Faults

Every hour or so an Apache child process seg. faults on our web server. We are running a non-threaded PHP 5.2.17 Apache module with Apache prefork MPM. I have run httpd with a few core dumps, gdb and this .gdbinit file from php's github repo, typing…
getWeberForStackExchange
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4
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2 answers

I get a Segmentation fault when doing apt-get util-linux

I've found that a lot of upgrade commands and Apache on my system are failing with Segmentation faults. I don't know if this is the main one, but a lot of packages depend on util-linux: root@myUbuntuHardyHeronServer:~# apt-get install…
Adam
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3
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1 answer

Xdebug Profiler Aggregate always crashes (xdebug.profiler_aggregate=1 causes coredump in xdebug.so xdebug_profiler_output_aggr_data())

Whenever I go to localhost I get a 404 error, until I mark xdebug.profiler_aggregate=0 The reason why is xdebug.so coredumps (SEGFAULT) [Xdebug] zend_extension=/usr/lib/php/20160303/xdebug.so xdebug.remote_enable=1 xdebug.remote_connect_back =…
Jonathan
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Segmentation fault when running any PHP

Update: I fixed this by running apt-get upgrade which updated many php packages, it must of been a buggy php extension which is now fixed I have vagrant running homestead (Ubuntu 14.10), when I ssh onto the VM and simply type php -v or even php…
Adam
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1 answer

Multiple segmentation faults on Linux host

I have an old Slackware 9.0 mail server on a VM at Linode.com. It has around 130GB of mail hosted on it, in Maildir format on partitioned, separate Ext3 filesystems (largest one is 92GB). I'm in the process of planning a server upgrade (completely…
zoot
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3
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What would cause a PHP app to segfault intermittently under load?

Posted this on stackoverflow but it seems more relevant over here... I'm doing some load testing (using jMeter) on a PHP app (it's a symfony app, if that matters). I've tested it under both apache/mod_php and nginx/php_fpm setups, and with multiple…
djrobstep
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1 answer

SSH broken, segfault error 4

i cannot connect to my server via ssh, it throws me a "server unexpectedly closed connection" after entering the password. in var/log/messages the only noteable message is: Apr 14 17:41:23 s15410270 kernel: sshd[3602]: segfault at c0 ip 7f0801acbdb0…
trampi
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