Apache CentOS Crash - Core Dump Analysis And Backtrace
Nov 30, 2013
I've been seeing lots of the following error in my error_log recently, I've enabled core dumps and have managed to analyse one using gdb:
[Fri Nov 29 20:44:41.318847 2013] [core:notice] [pid 2307] AH00051: child pid 7504 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump[Fri Nov 29 20:44:41.318937 2013] [core:notice] [pid 2307] AH00051: child pid 7623 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump[Fri Nov 29 20:44:43.324859 2013] [core:notice] [pid 2307] AH00051: child pid 7724 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump
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Jun 19, 2014
how to create Dump File for Apache Crash in Windows.We are using Apache for Reverse Proxy with OpenAM Module for Sign-in.Apache Version : 2.4.9.0...We are very frequently facing Apache Crash Issue.
Also in logs we do not get much information.when submitted logs to ForgeRock, they asked us to look into below error and provide Crash Dump.
[Sun Jun 15 23:00:10.153908 2014] [mpm_winnt:warn] [pid 2376:tid 424] (OS 64)The specified network name is no longer available. : AH00341: winnt_accept: Asynchronous AcceptEx failed.
[Sun Jun 15 23:02:21.609557 2014] [proxy_http:error] [pid 2376:tid 6544] (OS 10060)A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 10.XXX.XX.XX:XXXX] AH01095: prefetch request body failed to XX.XXX.XX.XX:XXX (teampark.sogeti.com) from XX.XXX.XX.XX (), referer: https://teampark.sogeti.com/blogs/roller-ui/authoring/weblog.do?method=create&weblog=VeckobrevIntegrationSyd&lang=sv_se
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Sep 5, 2014
generate crash dumps for apache 2.4.9 at the time freeze or crash in windows environment 2008 server R2.
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Dec 5, 2007
Files such as core.12762 keep appearing in the root web directory. Amount of core files appearing seems to be proportional to traffic. On average one core file per few million php requests.
Will appreciate advice on how to troubleshoot this issue, or how to disable the core dumping. As it is one error per few million requests it does not seem significant enough to spend several hours troubleshooting.
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Feb 4, 2015
I have enabled the backup rotation of some websites to my "Personal FTP Repository", the problem is that Plesk is unable to do it due this error:
Code:
Unable to rotate dump: The dump rotation is failed with code '121' at /usr/local/psa/admin/bin/plesk_agent_manager line 1041.
I read here [URL] .... that it should be solved but I have the version 12.0.18 Update #33, why does it persist?
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Apr 28, 2009
i have a CENOTS 5.3 server / i686 with a Q8200 core 2 quad processor,
for some reason when I run
cat /proc/cpuinfo each cose doesn;t report that its running full speed..
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Quad CPU Q8200 @ 2.33GHz
stepping : 7
cpu MHz : 1998.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4668.98
it shows all 4 cores but look at the MHZ, is there something i can do about this to fix this?
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Nov 23, 2008
i have the following server specs :-
Processor Intel Quad-Core Xeon X3323 2.5GHz/2x6MB 1066FSB
RAM 4GB 667MHz Dual Rank ECC Memory (4X1GB)
i have some sites vb forums / proxy sites / file hosting site / tube sites , all together some 10-12K visitors a day , i am using xcache , but still apache is crashing many times ,what should i do , i have asked platinum server management guys, they disable logs , suexec but still no luck, will increase of another 2gb of ram help me?
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Jul 8, 2008
The Apache service is getting crash and creaing following logs
[Mon Jul 07 23:52:21 2008] [notice] child pid 12878 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:21 2008] [notice] child pid 12881 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:21 2008] [notice] child pid 12886 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:22 2008] [notice] child pid 12859 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:23 2008] [notice] child pid 12904 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:23 2008] [notice] child pid 12909 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:25 2008] [notice] child pid 12877 exit signal Segmentation fault (11)
Server Specification.
4GB RAM
Apache : 2.0.52
PHP : PHP 5.2.5
MySQL : 5.0.51
httpd.conf
KeepAlive Off
MaxKeepAliveRequests 50
KeepAliveTimeout 10
StartServers 16
MinSpareServers 8
MaxSpareServers 64
ServerLimit 1000
MaxClients 500
MaxRequestsPerChild 5000
ServerSignature On
my.cnf (Seprate box with 2GB RAM)
log-slow-queries = /var/log/mysql/mysql-slow.log
skip-external-locking
skip-locking
skip-innodb
skip-bdb
skip-name-resolve
max_connections = 800
max_user_connections = 800
key_buffer = 36M
key_buffer_size = 64M
myisam_sort_buffer_size = 64M
join_buffer_size = 2M
read_buffer_size = 2M
sort_buffer_size = 3M
thread_stack = 128K
table_cache = 1024
thread_cache_size = 286
interactive_timeout = 25
wait_timeout = 1800
connect_timeout = 10
max_allowed_packet = 16M
max_connect_errors = 999999
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
tmp_table_size = 16M
old_passwords=1
user=mysql
quick
quote-names
max_allowed_packet = 16M
[isamchk]
key_buffer = 16M
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Mar 23, 2009
i have a forum on centos with php and mysql,
im not sure why there are many files like core.2323 or core.2742... in the folder of my forum,
i do not download or upload any files to there,
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Jun 8, 2007
Whats the Difference between Fedora Core & CentOS?
I think my host installed the wrong OS, but just wondering to see if it's worth changing the OS if they're both the same.
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Jun 4, 2007
I'm trying to install CentOS 4.4 in dual core 2 box without success, can't even finish installation. Read about a bug closed because it doesn't happen in CentOS 5, thus leaving me no option but to use unstable cPanel 11. Does anyone have any clue about this? Seems strange that there's no workaround.
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Mar 10, 2007
The Apache server on one of my box crashed last night and the log file simply states:
[Fri Mar 09 23:51:49 2007] [notice] caught SIGTERM, shutting down
One thing puzzled me is that there are a couple of symbolic links created in Apache home directory:
lrwxrwxrwx 1 root root 25 Mar 9 23:51 build;45f23959 -> ../../usr/lib/httpd/build
lrwxrwxrwx 1 root root 19 Mar 9 23:51 logs;45f23959 -> ../../var/log/httpd
They were created around the same time when Apached stopped.
Has anyone seen similar things like this? What could be the root cause?
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Jun 2, 2015
We have an ongoing problem with Plesk on 1and1 dedicated servers.We host around 80 websites, all of which are very light and have relatively low traffic. When we get to setting up around the 70th website and create a new sub-domain, Apache crashes with the error:
Template_Exception: Can not restart web server:
file: /usr/local/psa/admin/plib/Service/Driver/Web/Server/Apache.php
line: 104
code: 0
We then run "bootstrapper.sh repair" to get Apache back online. But can't create any new sub domains, without the same issue occuring. With each server, 1and1 raise a ticket with Parallels, who log in and fix the issue. But then Following the Parallels fix, the server runs slowly, sometime throwing up 502 errors etc, which nobody is able to fix, and again, we have to move servers.We have just hit exactly the same issue on our 3rd and final 1and1 server.
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Jun 17, 2008
I currently run a dedicated with redhat 9 and am looking at a new server with either Fedora Core, CentOS, or FreeBSD.
I'd like your opinions on the best o/s to go with overall and also bearing in mind I'm coming from redhat and will be running cpanel on it...
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Aug 23, 2014
Cpanel Server is crashing frequently and customer suspecting that it should be a hardware issue, what are all the logs and tools you need to check to figure out the root cause of the crash?
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Apr 27, 2009
Which CentOS distribution i386 or x86_64 do I need for intel core 2 duo 32bit desktop.
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Jul 27, 2008
how to install Ubuntu (either 7.10 or 8.04) as a XEN domU guest on a CentOS 5 / Fedora Core 8 XEN dom0 server?
I have tried installing Ubuntu as a fully virtualized guest, but the Ubuntu CD doesn't even bootup. I get the Linux bootloader, and that's it,it doesn't continue to boot. Odd.
When trying to install a Paravirtualized guest, I had to use the debootstrap method, but can't get it to boot up.
Quote:
xm create anya_zanet
Using config file "/etc/xen/anya_zanet".
Error: (2, 'Invalid kernel', 'xc_dom_find_loader: no loader found
')
This is the xen configuration:
Code:
kernel = "/boot/vmlinuz-2.6.23.1-42.fc8"
ramdisk = "/boot/initrd-2.6.23.1-42.fc8.img"
builder='linux'
memory = 256
name = "anya_zanet"
vcpus = 1
vif = [ 'bridge=xenbr0' ]
disk = [ 'phy:/dev/System/anya_zanet,hda1,w' , 'phy:/dev/System/anya_zanet,hda2,w' ]
root = "/dev/hda1 ro"
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'
how to get Ubuntu working on a CentOS / Fedora Core XEN server?
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Dec 22, 2008
Gazzin.com offers so many OSs on their VPS deals - CentOS, Debian, Fedora Core 3, Fedora Core 4, Gentoo, Opensuse, Suse, Unbuntu. Which one would you advise me to start from?
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May 16, 2007
I have a year's worth of Windows 2000 Server/ IIS 5 logs that I need to analyze for Web Traffic.
We used WebTrends 1999 for years, but we've lost the CD. I went to their site and their new offerings are too complex and too expensive.
I downloaded and installed SmarterStats to evaluate it. It seems to have only analyzed the first few days of the one-year's worth of log files. I couldn't find a number to call, and I couldn't get into their forum, so I decided I don't like them.
Webalizer seems to be just for *nix systems. This company is Windows based.
I need very basic information. Visitor sessions, popular pages, and, if possible, how many people clicked on an ad.
Also, the logs already exist. They just need to be analyzed. A solution that wants me to add something to my code might be appropriate going forward, but I need something that can read my existing log files.
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Jul 11, 2008
I recently decided to upgrade to a VPS from shared hosting. I have decided to give VPSLand a shot, even though I am a little skeptical after reading a few negative reviews.
I will be providing an in-depth ongoing analysis of my experiences with them for the benefit of the WebHostingTalk community.
I signed up for the "Windows-EZ VPS Value" package.
RAM: 768MB (a great vlaue)
HDD: 8GB
Transfer: 300 GB
Price: $29/month
( with 50% off first month coupon my total was $14.50 )
After completing the sign-up process, I checked my email and noticed I had received 6 automated e-mails from them during the process
The order was placed at 9:46am.
They e-mailed me that my VPS was created at 10:10am (nice)
The followup e-mail with my server information arrived at 10:20am. For a total of 34 minutes from sign-up to server access. So far I am very happy.
I will run a few tests and follow-up shortly.
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Sep 16, 2008
Given the novelty, the backing of a primary hosting player, etc., I had expected more info on Mosso than I'm seeing. One advantage I bring is I'm not a developer or operate a hosting company, just an entrepreneur who deals with his own servers. Here goes -
I don't think Mosso is ready for prime time. The marketing on their site is beautiful. When a friend recommended it (an entrepreneur like me), coupled with all the promises on their marketing pages, plus the pricing, I thought moving my service to Mosso was a no-brainer.
First of all, kudos to them for having a user forum. I firmly believe this is the right way to go. Unfortunately it also confirmed my experience was not unique. On the day I signed up, the control panel was not responsive. It took a long time and several attempts to load. The user forum also points to almost daily downtime, though granted for only a few minutes in most cases (via the pingdom links provided).
The forums are currently password protected, but a Mosso employee said this is accessible via a demo account. I suggest you review the forums before signing up with Mosso, it would have saved me time and effort.
In short -
1. The service doesn't provide the uptime suggested by their marketing pages.
2. Initial review suggests the software needs security updates. I emailed them my findings, hopefully it helps them. No response after 2 days. I'm keeping this vague intentionally.
3. The cancellation of an account was a mini-AOL-like experience. You can't cancel via the admin console. Turns out you cancel via email. What kills me most about this is the lack of understanding of security. They want me to email them my account's username and password. Since I'm human, I only have 2-3 passwords for all my accounts (banking, registar, etc.). And for me to email them my password is not appropriate at best. I had to use the "forget password" function to create a new one so I could email it to them.
4. I really think they over promise on their marketing. I think they should label it as a "beta" product to better reflect its status. The parent company has a great reputation, and I've used them in the past, hopefully they'll better protect their reputation by more openly reflecting Mosso's status. How can they have an enterprise level system with almost daily downtime?
5. My bad, but I didn't realize until after signing up that they offer no SLA uptime, just a partial refund when it goes down.
I really like the concept, and except for the fact I felt deceived, I would happily go back to Mosso because it provides what I'm looking for, once the marketing matches the delivery.
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May 28, 2013
I recently build an apache server in Solaris10 SRAC server and enabled the following modules.
LoadModule foo_module modules/mod_foo.so
LoadModule jk_module modules/mod_jk.so
LoadModule weblogic_module modules/mod_wl_22.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadFile "/usr/lib/libxml2.so"
LoadModule xml2enc_module modules/mod_xml2enc.so
LoadModule proxy_html_module modules/mod_proxy_html.so
Post that I tried a simple Reverse Proxy setup to confirm the apache work fine as a reverse proxy
### Proxy Setup ####
ProxyVia On
ProxyPass /console http://<apps-host>:8980/console
<Location /console>
ProxyPassReverse http://<apps-host>:8980/console
</Location>
Post these changes when I try starting apache I get the error - Segmentation Fault - core dumped
Checked the Error Logs it shows -
[Mon May 27 14:09:24 2013] [notice] child pid 29964 exit signal Segmentation fault (11)
[Mon May 27 14:09:32 2013] [notice] child pid 29963 exit signal Segmentation fault (11)
[Mon May 27 14:11:14 2013] [notice] caught SIGTERM, shutting down
[Mon May 27 14:11:19 2013] [warn] RSA server certificate CommonName (CN) `BUNTY RAY' does NOT match server name!?
[Mon May 27 14:11:19 2013] [warn] No JkLogFile defined in httpd.conf. Using default /opt/apache-2.2.24/logs/mod_jk.log
[code]....
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Apr 22, 2008
Shall I chose the xeon quad core 2.4 GHZ or the dual core 2.66 GHZ for an adserver's database?
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Nov 27, 2007
Which is the better performer?
(1x) Quad Core Intel Xeon X3220 2.40GHz 2x4M Cache
OR
(2x) Dual Core AMD Opteron 2216 2.4GHz 2X1MB Cache 1Ghz HyperTransport
This is for a web/application server running, Windows 2003 Server Professional, IIS, MySQL, MSSQL 2005 Express, Plesk 8.5. The price is about the same.
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Jan 3, 2008
I've been searching around with google regarding how to downgrade the Apache 2.2 which comes with CentOS 5 to Apache 1.3.39.
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Feb 3, 2008
quad core processor vs Intel Xeon 3060 Dual Core Conroe Processor which is better any why?
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May 23, 2009
i installed httpd from yum and all ok.When i check my site via acunetix vulnerability scanner says Apache version older than 2.2.8.So it is vulnerable.
I must upgrade httpd to newer version but i cant.
Yum update says that httpd 2.2.3 is latest but ITS NOT.
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Oct 24, 2008
I want to install following S/W on CentOS --->
a. Apache 2.2.9 with SSL
b. JBoss 4.2.3
c. JDK 5.0 update 16
d. Postgres 8.2.10
Are they work properly on the CentOS server?
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Oct 30, 2008
can someone give a comparison betwen this two
Intel Quad Core Xeon X3210 vs Dual-Core 3040 Xeon
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Dec 5, 2008
I'm using centos 5.2. To my surprise this only comes with php 5.1.6 and apache 2.0
I want the latest versions, php 5.2.7, apache 2.2.10, mysql 5.1 -- Are there any repositories for this available? (Or however I can upgrade with yum)
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