Apache :: Httpd Service Unavailable 503 Error
Jan 13, 2015
I am using windows 2008 R2 64 bit O.S, I downloaded httpd-2.4.10-win64-VC11 and tomcat-connectors-1.2.39-windows-x86_64-httpd-2.4.x and I created 3 tomcat workers and then I configured workers.properties and httpd.conf.
After complete setup when i tried using
http://localhost then
I got It works! message (looks everything is fine).
and then I have deployed my sample web application I tried to access the same application then using
http://localhost/SampleCluster
I am getting
503 service not available.
Service Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
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Oct 16, 2014
We have just installed the plesk version 12. All the installation completed without errors . then we restarted the server . and when we tried to open the plesk through the desktop shortcut we get the error " HTTP Error 503. The service is unavailable."
We have tried the following links fix HTTP , kb6735 .
Why does we get this error ?
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Aug 5, 2014
Since the last update I am having constant troubles with email accounts when sending or replying to email messages.
This is the message I am getting:-
"error sending your message: Service unavailable - try again later"​
This is our system and the software is the Parellels with Business Manager and stuff.
OS CentOS 6.5 (Final)
Plesk version 12.0.18 Update #10, last updated at Aug 4, 2014 05:00 AM
The system is up-to-date; last checked at Aug 3, 2014 04:44 AM​
This is what the error looks like in the log file located at /usr/local/psa/var/log/maillog
Aug 6 11:54:08 host spamd[28992]: spamd: connection from localhost [127.0.0.1] at port 37548
Aug 6 11:54:08 host spamd[14212]: prefork: child states: II
Aug 6 11:54:08 host courier-imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 6 11:54:08 host courier-imapd: LOGOUT, ip=[::ffff:127.0.0.1], rcvd=12, sent=365
[Code] ....
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May 17, 2008
It's been happening on both my old and new server, was really hoping this would be fixed.
Basically, the httpd/apache service crashes or goes down making domain names and sites unable to load; although cPanel/WHM still accessible. This would go on for about 5 minutes OR until I restart httpd in root.
sites simply do not load or just timeout after a period of time.
This has become extremely annoying for both me and my clients because it makes it seem like we have downtime.
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Jul 21, 2014
Out of nowhere apache stops working, and I have to restart the httpd service that restablesca
The message it throws is "Service Unavailable"
The server is a CentOS Linux Centos 6.5
It has 24 cores and 24 GB RAM
These are the values ​​that I have in httpd.conf
Timeout 60
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
[Code]....
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Apr 24, 2007
Using Apache 2.0.52 + PHP 4.3.10 on Linux (Fedora Core 2), I get this
error message when accesing my PHP page:
---------------
Service Unavailable - Zero size object
The server is temporarily unable to service your request. Please try
again later.
Reference #15.21eaaad4.1173400585.294a7ed8
---------------
I fixed it by restarting Apache, but I'd like to know the reason of this error. Does anybody have any experience with this issue?
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Jul 9, 2009
I setup Ruby Rails via Cpanel > Ruby Rails area.
I have uploaded typo files to /etc/rails_apps/typo and setup mysql database user password. When I visit the domain at [url]typo I get a 503 / Service Temporarily Unavailable error message.
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Feb 20, 2014
Suddenly my server stop to accept mail from outside. Here you have the logs of mail.info
Feb 20 14:26:02 xxx postfix/smtpd[5581]: 17098E1CCB: milter-reject: DATA from mail2.email-o-matic.com[217.116.24.xxx]: 451 4.7.1 Service unavailable - try again later; from=<empresas@xxx.es> to=<whatever@whatwever.es> proto=ESMTP helo=<mail2.email-o-matic.com>
It seems it is a milter problem as in the line I can read "milter-reject"
Also I have a lot of lines like this:
Feb 20 14:27:34 dv2 greylisting filter[9152]: Starting greylisting filter...
Feb 20 14:27:36 dv2 greylisting filter[9154]: Starting greylisting filter...
Feb 20 14:27:37 dv2 greylisting filter[9165]: Starting greylisting filter...
I can go to control panel and stop plesk milter but I see these lines on mail.info
Feb 20 14:30:04 xxx postfix/smtpd[8845]: warning: connect to Milter service inet:127.0.0.1:12768: Connection refused
And 4.7.1 still there
Feb 20 14:30:03 xxx postfix/smtpd[7289]: NOQUEUE: milter-reject: CONNECT from 223.179.15.xx.dynamic.jazztel.es[37.15.179.xx]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
Maybe is a port (12768) connection error? How I can test that port?
This KB article does not solve anything as the load of the server is 0.1-0.5 [URL] ....
A temporal fix is to edit /etc/postfix/main.cf file comment these two lines:
smtpd_milters = , inet:127.0.0.1:12768
non_smtpd_milters = , inet:127.0.0.1:12768
And restart postfix (/etc/init.d/postfix restart)
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Sep 5, 2014
I'm running a CentOS 6 server with Plesk 11.0.9 installed. It's only being used for dev purposes with only a couple vhosts running on it. All of the vhosts are using PHP - there are a few WordPress sites and Zend Framework 2 applications running. Up until a few months ago it was also running a high traffic WordPress site, but that's no longer the case.
This server has been running without problems for over a year. A few days ago I first started noticing 503 errors (Service Temporarily Unavailable) on accessing one of the vhosts from the web browser.
I logged on through ssh and noticed the load was a bit higher than I expected (nothing crazy though). All other vhosts using PHP also gave me the same error. The only vhost that was working normal was a Ruby on Rails app (Redmine).
I also did a netstat -napt and noticed many connections from two or three IP addresses. I checked their geographical location and after blocking them through iptables the problem seemed to have gone away.
Now it's a few days later and the same problem started popping up. I checked again through netstat and noticed that again a whole bunch of connections from only a handful of IP addresses were connected to Apache.
When I was digging deeper I noticed that some of those IP addresses were what looks to me like other servers (at least they're running Apache). I'm suspecting they are hacked servers and they're trying to use my server to send spam or some other type of evil.
I just blocked those new IP addresses in iptables and that seemed to have solved the problem for now again, but I want to solve the root of the problem.
So my questions are:
1) How can I find out to what vhost those clients are connected?
2) Why does Apache stop working with not that many client connections, when it used to serve thousands of visitors at the same time when that big site was still running on this server?
3) What could they possibly be using my server for? The first time it happened I thought that they found some leaking WordPress plugin to use to spam people, but today I checked and there's barely anything in the mail queue.
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Jun 25, 2015
I have a question regarding greylisting.
I activated greylisting on my mailserver and took a look in the logfiles.
The mail are temporary rejected with the following log message / statuscode:
451 4.7.1 Service unavailable - try again later;
Mails from my server to other servers are greylisted with messages like:
451 4.7.1 message delayed, see http://www.greylisting.org ;
452 Greylisted. Please try again after some time.
451 4.7.1 <E-MAIL-ADRESSE>: Sender address rejected: Greylisting in action. Please try again later.
Is it possible to change this log message at my server?
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Apr 12, 2015
Every now and then I will attempt to load my Plesk 12, CentOS6 Website, and receive the following error:
503, Service Temporarily Unavailable.
It requires a restart of nginx and apache in order to remove the error. It then can come back in a week, or in a few hours. Its completely random. I also can't find anything in the logs.
This started happening after I enabled backups, then later disabled backups because of problems with my backup server. However this does not occur when my scheduled backup was.
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Jan 21, 2015
All genuine emails are making it through fine - barring one or two domains, which fail with postfix/cleanup[5184]: warning: milter inet:127.0.0.1:12768: can't read SMFIC_BODYEOB reply packet header: Connection timed out
postfix/cleanup[5184]: 5082A22A8E: milter-reject: END-OF-MESSAGE from XX-XX-202-76.dsl.in-addr.zen.co.uk[XX.XX.202.76]: 4.7.1 Service unavailable - try again later; from=<newsalert@financialexpress.net> to=<nameremoved@domain.co.uk> proto=ESMTP helo=<mailrelayname.co.uk>
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Jul 31, 2013
httpd server configuring.I share my files only from local disks but some of my resources are located on truecrypt secure volume.When I want to start my server now I have to mount my all drives first to have all path active. Otherwise httpd doesn't start with 'invalid path' error.My question is, how to force httpd starting without path or drive exists checking?
Platform Windows7 x64
Apache version 2.4.3
Package Xampp
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Jul 25, 2008
I have all my specify modules are loaded in pache like mod_rewrite in other face I have a script need require mod_rewrite in install steps but I have in testing : Apache Mod-Rewrite Unavailable
but when I run httpd -l I get this list
PHP Code:
[root@server ~]# httpd -lCompiled in modules: core.c prefork.c http_core.c mod_so.c[root@server ~]#
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Jan 14, 2014
Issue: Unable to access simple server status reports though server-status.(chrome could not find..)
Environment:
Home Lab; Win8(dont ask..)
apache 2.0(httpd-2.0.64-win32-x86-no_ssl)
*Fire down, router rules unrestrictive
set in httpd:
...
<Location /server-status>
SetHandler server-status
Order Deny,Allow
Deny from all
Allow from all
</Location>
...
Advanced mods, require compilation to standing installation of apache but the server status is said to be precompiled with the version.
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Jan 27, 2007
In Cpanel, If i click on Apache Status it tells me aload of website that have been visited recently, under the vhost column. It shows this but sometimes under those it shows aload of (unavailable). Why is this. Is this normal?
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Jun 15, 2014
Clean install on openSUSE 13.1
After deleting a domain, we got the following error which rendered the panel useless.
Internal error: Unable to find service node for web service on domain with id=5
Message Unable to find service node for web service on domain with id=5
File PhDomain.php
Line 1402
Type PleskDBException
Go To Previous Page
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Jul 30, 2009
httpd failed @ Thu Jul 30 15:55:02 2009. A restart was attempted automagically.
Service Check Method: [tcp connect]
Failure Reason: Timeout while trying to connect to service
and
httpd failed @ Thu Jul 30 15:29:57 2009. A restart was attempted automagically.
Service Check Method: [tcp connect]
Failure Reason: Unable to connect to port 80
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Aug 5, 2008
i have adedicated server and it was running will but suddnly from 1 week to this time
the httpd (2.2.9 (Unix)) failed and the sites down for amoment and then return to work well the server load and memory used are well there is no any overload so why this problem appear suddenly? and how to resolve it?
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Aug 3, 2008
I am trying to restart my apache since i made changes to my php.ini file.
I tried using this command /etc/init.d/httpd restart which didnt work for me..any ideas guys? Its a basic dedicated server from a hosting company..
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Mar 6, 2008
I recently updated to apache 2.2 and when I went to check
/usr/local/apache/conf/httpd.conf
I noticed that a lot of the stuff was missing from what I usually see in apache 1.3 Was a new file created when the update was finish? I used easyapache to make the update.
I was actually looking to change the
Keepalive
Timeout
MinSpareServers
MaxSpareServers
MaxRequestsPerChild
Etc...
But it doesn't look like it's in there.
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Sep 15, 2008
how should I optimize httpd.conf on my server. Apache was set up by my friend, unfortunately it started to "stuck" lately during peak time. Browser is connecting to a website for a long time before it actually starts to load it.
My current setup:
Timeout 300
KeepAlive On
MaxKeepAliveRequests 300
KeepAliveTimeout 15
MinSpareServers 2
MaxSpareServers 5
StartServers 5
ServerLimit 650
MaxClients 650
Server:
Intel Quad-Core Xeon X3220 @ 2.40 GHZ
4x 2GiB Kingston ECC Not-Registred 667Mhz
2x 150GiB RaptorX 10k RPM, sw raid 1
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Nov 10, 2007
tuning apache configurations, and would like to seek for some opinions on how I should optimize my httpd.conf
The server is primarily for downloads, serving file sizes that are around 100~200MB.
how I should configure my apache so it'll allow a better/faster/more stable environment?
Hardware Specs:
Intel Xeon 3220 Quad-Core (2.4Ghz)
2GB Ram
My current httpd.conf
ServerTokens None
ServerRoot "/etc/httpd"
PidFile run/httpd.pid
Timeout 20
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
##
## Server-Pool Size Regulation (MPM specific)
##
# prefork MPM
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>
# worker MPM
<IfModule worker.c>
StartServers 4
MaxClients 500
MinSpareThreads 25
MaxSpareThreads 100
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
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Jul 12, 2013
httpd 2.4.4 x64 with php 5.5 x64 and mysql 5.6 x64, it worked just fine the first few days, but after a week or so, I'm starting to get this error:
[mpm_winnt:notice] [pid 1928:tid 552] AH00428: Parent: child process 8092 exited with status 255 -- Restarting.
What can cause that and how can I fix it?
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Sep 28, 2014
I can't reach my website, I get a "corrupted content" error message in the browser.Looking into apache (version 2.4.7), I get
Code:
~$ apachectl -S
AH00526: Syntax error on line 22 of /etc/apache2/sites-enabled/000-default.conf:
SSLCertificateKeyFile: file '/etc/ssl/private/owncloud.key' does not exist or is empty
Action '-S' failed.
However, I double checked that the file is in the appropriate location and does contain the key, so maybe apache has no permission. afaik, it doesn't run as root all the time - or only for a short time?
permissions for the key file are as follows:
Code:
~$ sudo ls -l /etc/ssl/private/owncloud.key
-rw-r--r-- 1 root ben 1704 Sep 28 04:01 /etc/ssl/private/owncloud.key
, where ben is my normal user.
It was suggested to me on the httpd IRC channel that maybe apparmor was doing something wrong, but I don't know how to investigate that.
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Mar 9, 2013
I did some googling and searching on Apache lounge forums prior to posting this question, but I didn't find a definite answer to whether is it ok to use Apache Httpd v2.4.X VC10
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