CentOS 5 Server :: PCI Scans Causes HTTPD Process To Use All Memory
Jun 22, 2009
We had servers that worked fine for years. After updated them to the latest version of CentOS (5.2 with latest updates), they keeps on hanging when being scanned by PCI Verdors (a Credit Card security standard). Basically, the scan causes httpd process to eat up all memory, and the server becomes unresponsive. Normal operations resume after the scan stops for 5, 10 minutes. Output from top looks like the following:
Mem: 1018988k total, 1007168k used, 11820k free, 432k buffers
Swap: 2096440k total, 2096440k used, 0k free, 4528k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13601 apache 16 0 289m 102m 456 D 4.0 10.3 0:15.25 httpd
12836 apache 16 0 330m 101m 232 S 2.4 10.2 0:17.57 httpd
12834 apache 16 0 341m 100m 292 D 8.9 10.1 0:17.70 httpd
12837 apache 16 0 317m 99m 456 D 6.0 10.0 0:17.66 httpd
12839 apache 15 0 327m 97m 232 S 0.0 9.8 0:17.37 httpd
13590 apache 15 0 287m 96m 228 S 0.7 9.7 0:15.18 httpd
12833 apache 15 0 333m 96m 232 S 2.2 9.7 0:17.58 httpd
12835 apache 15 0 322m 95m 232 S 0.4 9.6 0:17.50 httpd
12840 apache 15 0 310m 88m 232 S 6.9 8.9 0:17.34 httpd
12838 apache 15 0 297m 85m 232 S 1.3 8.6 0:16.52 httpd
12831 root 18 0 20644 1360 248 S 1.3 0.1 0:00.27 httpd
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Sep 11, 2009
My server keeps freezing up requiring a hard reboot.
CentOS release 5.3 (Final)
httpd-2.2.3-22.el5.centos.2
Here is the error in /var/log/message
Sep 11 00:16:20 localhost kernel: httpd invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
Sep 11 00:19:14 localhost kernel: [<c0459e7d>] out_of_memory+0x72/0x1a5
Sep 11 00:19:14 localhost kernel: [<c045b352>] __alloc_pages+0x216/0x297
Sep 11 00:19:14 localhost kernel: [<c045c5bf>] __do_page_cache_readahead+0xc4/0x1c6
Sep 11 00:19:14 localhost kernel: [<c0436d9a>] ktime_get_ts+0x16/0x44
[Code]...
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Jan 26, 2011
I am using qmail in my office. I am noticing this for more than a month. It is my daily routine to check the cpu utilization using top command and by using top different processes can be viewed. the apache process after 1 or 2 days shows cpu utilization of 100%. There is no affect on the server whatsoever of 100% because mail server has 2 processors of 4 core, i think so that may be the reason. Can any one explain why is this happening. What i do after that is i restart the httpd process and cpu utilization comes to normal. What are the reasons behind this and how to solve this permanently.
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Jun 10, 2011
Running CentOS 5 x64 And today my httpd is running very slow and I can't find a fix. Looked all over different forums
When starting httpd I get the message: /var/lock/subsys/httpd': No space left on device I checked that directory above and there is no file called httpd tried rebooting server
Can't do updates too:
[root@u15438957 ~]# yum update
Loaded plugins: fastestmirror, priorities
rpmdb: unable to join the environment
[Code]...
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Apr 30, 2011
Linux 2.6.18-238.9.1.el5
Apache 2.2.3
MySql 5.0.77
PHP 5.3.3
Samba 3.5.4-0.70.el5_6.1
Problem: my server eats up all the memory in the box after a few days. My guess is it has something to do with these processes:
[Code]...
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Jan 24, 2011
I use linux and Unix and I want to monitor the memory usage for process. To prevent memory leakage and out of memory of the system. Any command or sytnax , have more better and presentable data than below command about memory usage of one process ?
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Jun 1, 2009
I have just configured CentOS server my new office. This is the first time I am using CentOS.
Whenever I am trying to change the webroot of the httpd server, it usually say "directory doesn't exist". whereas which can't be the case as it is home directory of the user.
To achieve this, what Do I need to do?
The second issue, I am facing that whenever I am adding new directories to public_html folder, it is not accessible. as the error page 404 is shown. I have changed the permissions to 0705 and ownership is also transferred to other user. What else is required to make new directories accessible by the web?
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May 7, 2009
i am running cent 5.1 and would like to upgrade httpd v.2.2.3 to the latest 2.2.11 version provided by apache to resolve some ajp errors i am experiencing.
I searched but did not find any rpms for cent nor did i find any instructions on how to do this.
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May 15, 2009
My server running CentOS 5.3. I use yum to install httpd, httpd-devel, php and it's module to run my site.
When I setup VirtualHost, i open httpd.conf and add some directive:
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Oct 15, 2009
I'd like to share /usr/share/docs out to my local subnet via httpd so I can read server documentation from my workstation. I've simply done a generic install of httpd and httpd-manual and added this to the bottom of my httpd.conf file:
alias /docs /usr/share/doc
<Directory /usr/share/doc>
Order deny,allow
[code]....
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Jul 2, 2011
I just upgraded to CentOS 5.6 (been on 5.2 for ages....) and am getting the following error in the apache error_log file:[Sat Jul 02 13:50:25 2011] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)[Sat Jul 02 13:50:25 2011] [error] SSL Library Error: -8187 Security library: invalid argumentsThe notice entry, I can understand, however the SSL error is halting apache from starting. It has been suggested that this might be a package mismatch issue. I'll be more than happy sharing the package list for this box on request.
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Mar 18, 2011
I have a computer with 16GB of ram. At the moment, top shows all the RAM is taken, (NOT by cache), but the RAM used by the various processes is very far from 16GB.I have seen this problem several times, but I don't understand what is happening.My only remedy so far has been to reboot the machine.
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May 5, 2011
My Objective is to add Private MIB and compile that file and perform snmpget and snmpset operation. My MIb file contain this macro
[Code]...
Next I try to cmpile using mib2c highCpuUsage. it's give template code for that. I read all the tutorial and copy in /mibgroup and restart snmpd service and try snmpwalk ,snmpset but it�s not work and in var/log/messages its give Out of Memory: Killed process 8005 (snmpd)
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Sep 15, 2009
I have a VPS server installed with centos 5.3. The server has directadmin. Probably that when directadmin was installed, the httpd server of choice was apache 2.2.13.
My problem is that i whant to install mod_dav_svn trough yum but without updating the latest version of apache form yum repository. If i exclude the httpd package when doing yum install mod_dav mod_dav_svn i get a dependency error witch say that i nedd httpd-mmn installed. So, my question is, how can i use yum to install mod_dav_svn without updating the httpd.
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Sep 30, 2009
installed a new centOS 5 server, and after the installation, everything seem to work well but for httpd not running. when i try to issue the restart command i get the following error:
[root@appdev ~]# service httpd restart
Stopping httpd: [FAILED]
Starting httpd: httpd: Syntax error on line 206 of /etc/httpd/conf/httpd.conf: Cannot load
[code]....
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Feb 9, 2010
For the first time in installed and configured centos-ds from this HowTos and from the manuals.It is running nicely but disabled my httpd.Is it not possible to run directory service and httpd in the same machine
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Apr 22, 2011
I installed centos 5.5 and httpd service was working well for the last 2 weeks till yesterday. I restarted server and noted my hosting service were not working. I have tried service httpd restart on the terminal and it dispalys [FAILED]. I updated my machine and and have tried restarting it but it doesn't work. I am new to centos and I dont know how to solve this.
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Aug 8, 2011
I've got a box with a fresh installation of CentOS 5.6, but had several configs copied from an old 4.8 box that I've now got to finish. Most everything seems fine, but I can't get apache running. It reports that it starts up fine, but immediately stops and reports "httpd dead but subsys locked"Most of the advice I've found while searching suggests to just delete the http.pid file and restart, which doesn't help in my case. I did find a few problems where SELinux was restricting httpd from creating or touching certain files (I found reports in /var/log/messages) but I've worked through that.
So the big question here is: /var/log/messages and /var/log/httpd/error_log are now empty, and don't show any more errors when I restart httpd. Does anyone know where else I can look for reporting/logging on what's happening to httpd to cause it to die?
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Jan 29, 2011
I have had a fresh install of Ubuntu 9.10 and installed some software after that.Since third some, some process is eating half of my memory.I have checked processes running in system manager but everything is normal.Maximum is consumed by compiz which is about 26 mb, seems very normal.I did restarted my computer several times, and in the start for 5 mins, its fine after that again my cpu fans runs at very fast speed and my one cpu is used up 95 % (I have dual core).Please help me out, this invisible thing is driving me crazy.I am attaching my htop screen shot (sorted by cpu %), now the cpu is not used by completely but fan is still struggling hard and fast.
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Jul 26, 2011
I been tryin to install httpd-devel on Centos 5 with plesk i keep gettin Missing Dependency errors i went to url
and got attached packages but they give me this error
Code:
# rpm -ivh httpd-devel-2.2.3-45.el5.centos.1.x86_64.rpm Failed dependencies:
httpd = 2.2.3-45.el5.centos.1 is needed by httpd-devel-2.2.3-45.el5.centos.1.x86_64
Code:
yum install httpd-devel
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
code....
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Oct 31, 2010
I've added httpd to runlevels 2-5 using chkconfig, and also double checked it using ntsysv, but it still won't run on startup, even though it works just fine when started manually (using "sudo service httpd start").The results of "chkconfig --list httpd" show it is on for levels 2-5, and I've confirmed the current runlevel to be 3. I've found no errors in the logs (neither Apache's nor the system's), but maybe I'm looking at them wrong...My machine is a VPS (on VMWare) running CentOS 5.5 32bit. For additional information, see the output of getinfo.sh: http://pastebin.centos.org/35570I would greatly appreciate help on this, as it is delaying our NGO from moving servers.
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Feb 10, 2010
I am running centos 5.4, kernel 2.6.18. Also running httpd (apache2) as a reverse proxy with the following modules
mod_ssl
mod_cache
mod_proxy_*
Recently after updating these modules:
mod_ssl x86_64 1:2.2.3-31.el5.centos.2
httpd x86_64 2.2.3-31.el5.centos.2
distcache x86_64 1.4.5-14.1
I am getting wierd errors in the error logs:
[Wed Feb 10 15:44:18 2010] [error] (103)Software caused connection abort: cache: error returned while trying to return disk cached data
[Wed Feb 10 15:44:45 2010] [error] (103)Software caused connection abort: cache: error returned while trying to return disk cached data
[Wed Feb 10 15:44:48 2010] [error] (103)Software caused connection abort: cache: error returned while trying to return disk cached data .....
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Nov 9, 2009
accidentally I do something wrong with my server and the httpd folder missing and I need it to setup my mail server and anyone can help me what can I do without reinstalling my Cent OS? Here is the error msg :
[root@mydomain etc]# service httpd stop
Stopping httpd: [FAILED]
[root@mydomain etc]# service httpd restart
[code]....
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Jun 30, 2010
I've been trying to make install apache 2.1.8 and php 5.2.3 and work on them. After updating and installing some dependence files, apache and php could both be installed.
Then I tried to configure them. I added the following content to the end of Apache httpd.conf:
Code:
Then I run /path/to/apachectl start, and saw the message:
Quote:
Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration
Then I remembered that I didn't include the rewrite module while making install apache. So I removed the 2 lines I just added to httpd.conf.
But, after running /path/to/apachectl stop and start again, I could still see:
Code:
When I use firefox to open http://host_ip:8080/, I could see "It works!". But when I open http://host_ip:8080/hello.php (the file is already under htdocs), firefox said
Quote:
Failed to Connect
Why and how to solve it?
I noticed that for some stupid reason, the conf file wasn't updated at all and the 2 erroneous lines were still there.
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Mar 3, 2010
Basicly just installed a fresh version of Cent OS 5.4 with apache httpd installed automaticly during the installation. The http daemon is running and when navigating to localhost i get the welcome cent os apache page thingy. The problem is when i put an index.html file in /var/http/www then try and navigation to localhost I get a 403 forbidden error.
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Apr 29, 2010
I have just been told that httpd was not running on my Centos virtual server. It seems that my hosting company rebooted my server 2 days ago and that httpd restart failed due to:
Starting httpd: httpd:
Syntax error on line 213 of /etc/httpd/conf/httpd.conf:
Syntax error on line 2 of /etc/httpd/conf.d/proxy_ajp.conf:
Cannot load /etc/httpd/modules/mod_proxy_ajp.so into server: /etc/httpd/modules/mod_proxy_ajp.so: undefined symbol: proxy_module
I had worked around and forgotten about this some time ago. The problem arose because the most recent httpd update installed proxy_ajp.conf into /etc/httpd/conf.d which was then loaded on restart The trouble is I do not use mod_proxy (I think just to try and get a lean and mean web server) and proxy_ajp.conf does not check if mod_proxy is loaded before it tries to LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
Hence httpd fails to restart. RedHats's bug tracker lists this as an old issue (which was never resolved) [URL] My workaround was to rename proxy_ajp.conf to proxy_ajp.conf.orig so that httpd would start up correctly. However any updates simply reinstall proxy_ajp.conf and so IMO the problem needs to be resolved at source. how to ensure that httpd updates do not bite me in the future? Do I really have to run mod_proxy whether or not I need it?
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Jul 30, 2010
We are using this url on our testing box and this ip is reverse proxy IP ( 10.192.64.52)
Without reverse proxy:- URL is working fine.
http://10.192.16.77/akc-qa/arsys/ser...TS000000001430
But with reverse proxy its putting escape [%25] in between %3a
[url]
Is it possible to write a rewrite rule to bypass escape [NE] for this particular URL?
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Aug 27, 2010
I just ran into a weird problem with a CentOS 5.5 64-bit server running VirtualBox 3.2.8 (I would run Vmware Server 2.0.2 if not for the well known fact that Vmware doesn't care about its Server line anymore and it doesn't run on CentOS > 5.3 without major splits). I currently have two guests in that VirtualBox setup, a CentOS 5.5 64-bit and a Fedora 13 64-bit. The CentOS 5.5 guest shows less memory available than configured. If, for example, I give the virtual machine 512MB of memory the guest OS only recognizes 380MB. If I give it 768MB it only recognizes 637MB, and so on. I don't have that problem on the Fedora guest - 1024MB configured, 1024MB available.
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Aug 9, 2011
When ever I have an issue with our LDAP server (which I was able to fix) we see the following errors in /var/log/messages and it causes problems with our services running on that box, e.g. httpd, nrpe, xinetd, etc. Aug 8 17:44:42 hostname httpd: nss_ldap: failed to bind to LDAP server ldap://serveraddress/: Can't contact LDAP server Aug 8 17:44:42 hostname httpd: nss_ldap: reconnecting to LDAP server (sleeping 64 seconds)... I am only wanting to authenticate SSH and Sudo and not services like httpd, nrpe, xinetd etc.
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May 9, 2011
I recently inherited a server that I'm now looking after, and when browsing the running processes I came across a number of processes labelled:"/usr/local/apache-2.2.6/bin/.libs/lt-httpd -k start"
At any one time there are between 10 and 15 of them running.Googling the issue has been surprisingly unhelpful... can anybody even tell me what this process is, much less what sort of issue might result in multiple running copies? I'm running Debian Etch (release 4.0).
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