Knowledgebase: ASP .NET / ASP
My site is showing the following error: HTTP Error 503. The service is unavailable.
Posted by Arvand Sabetian (Import) on 18 May 2009 06:04 AM
The error HTTP Error 503. The service is unavailable. generally means that your application pool has crashed. Please contact support and have your application pool restarted.
(161 vote(s))
Not helpful

Comments (10)
Rory Haynie
01 July 2011 02:15 PM
Can we schedule a time for our pools to recycle daily?
Arvand Sabetian
05 July 2011 09:58 AM
Well pools are recycled daily and every 20 minutes if you have no traffic. However, to re-start the pools, unfortunately, at this point, a staff member needs to do it. However, the latest update to our control panel which is coming up soon will allow you to start/stop your own app pool from the control panel as well.
19 May 2012 10:49 PM
Why it doesn't restart automatically ?
Michael Carr
27 September 2012 10:31 AM
It will attempt to do so, A 503 means that this attempt has failed due to some error with the site. A manual restart will override this, but if you are seeing 503's frequently, you should investigate the web logs to see what is causing the failure.
robert Kleyn
21 July 2013 05:57 AM
HTTP Error 503. The service is unavailable.
Michael Carr
23 July 2013 11:12 AM
As noted in the article, this usually indicates something within your site has caused the application pool to crash. Contact any of our support personal and we can restart it for you.
Lu Cong
31 August 2013 11:23 PM
Service Unavailable


HTTP Error 503. The service is unavailable.

Hi, Arvixe support,
Currently, we frequently face the problem of service unavailable, can you please help check urgently why it happen so frenquently, it is really a big issue for a E-commerce website, please help check and see whether you can permanent fix the issue
Michael Carr
17 September 2013 12:13 PM
503 errors generally stem from problems within your site. A coding problem or memory leak will consume all the resources in your pool until it crashes. At that point a restart of your application pool is required. If you can create a support ticket, we can look at your issue in details to see what specific problems it is having.
Phengchanh Phanthanalay
28 March 2014 01:45 AM
Problem is that each site doesnt seem to have its own aqpplication pool. I get this error on all my sites, which are on the same shared server. That makes me believe that the application pool is for each user with all his domains, or even worse, one application pool for the whole server, which have thousands of domains. Please verify how application pools are distributed and that they are configured correct. It seems that mine restart when they crash, but it happens very frequently, some times every 5 minutes
Michael Carr
16 April 2014 09:08 AM
It depends on how you setup the websites. If you did not enable the recommended option for the sites to have their own application pools then they will all share the same pool for your account.
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