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When I browse to Central Administration I get repeated authentication requests and am unable to view the page. I get the following error:

Service Unavailable

HTTP Error 503. The service is unavailable.

The Application Pool of IIS 7 is shown as stopped. All web applications have this problem.

I have searched on Google and set Credential in (Advance setting->Identity) on the Application Pool of Central Administration but my second web Application was in FBA Configuration so when I browse to it I get the same error as above.

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1  
You may want to get more info about the error by checking the logs. Try Ulsviewer archive.msdn.microsoft.com/ULSViewer –  Jimbo Alba Nov 8 '11 at 12:22
    
@Jigs - thanks for your question. I have tried to edit it to improve the grammar, but could you please check it to make sure that I have understood your original question correctly, and modify if necessary. Thanks. –  SPDoctor Nov 8 '11 at 13:23
    
As well as the ULS logs, I suggest you check your Windows event logs for errors - it may not have got as far as SharePoint. –  SPDoctor Nov 8 '11 at 13:25

9 Answers 9

up vote 3 down vote accepted

I found that the problem I had that resulted in a 503 was due to the App Pool being set to support 32-bit applications.

I went to IIS manager, app pool, advanced settings, and set "Enable 32-bit applications" to "False".

This was on a Content App pool, though, not Central Admin.

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@sir - its Already set False. but Till not set Fix Issue. –  Jigs Nov 8 '11 at 14:38

Check whether your credentials for your domain has changed and you did not apply it.

If this is the issue, change the following: - Open app pool advance setting > Identity > custom account > Set (give user name and passowrd)

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you should never set this through IIS. Use Central Administration > Security > Service Accounts to set accounts for services! –  Anders Rask Jul 7 at 10:59

Try adding http://server_name:port_of_centralAdmin to your Local Intranet Sites, close the browser and try again.

Also are you trying to do this from your SP server. If so have you disabled your Loopback?

Also check your Farm Account under Application Pool is A ok

Cheers

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Check Event Viewer on the server? I'm leaning towards permissions/identity of the app pool.

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in Event Viewer i got this one error "Application pool '<Application site name>' is being automatically disabled due to a series of failures in the process(es) serving that application pool." –  Jigs Nov 8 '11 at 14:16
    
Whoa... reboot? That can help clear out everything and let it start fresh. Any other errors around that one? –  David Lozzi Nov 8 '11 at 15:01
    
Yeah..second error is: The SharePoint 2010 Timer service terminated unexpectedly. It has done this 38 time(s). The following corrective action will be taken in 30000 milliseconds: Restart the service. –  Jigs Nov 9 '11 at 5:18
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have you done a reboot? –  David Lozzi Nov 9 '11 at 12:37
    
nope..i thought that perhaps all things come back when i will did upgrade my sharepoint server 2010(with August CU 2010) but still not fix my issues.so decide Reboot PC :P && thanks all guys for guide me. –  Jigs Nov 9 '11 at 14:09

Check whether the account running your application pool services (Domain\Username) is locked in the Active Directory. If it is locked, these issues can happen.

You need to go to the IIS Manager and drill down to the App pool section. Check the App pools which are stopped and verify the username(Domain\Username) used.

To unlock, go to the Active Directory, search for the same user, edit the properties and there would be a checkbox option to unlock the account.

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1) Open IIS.

2) Right click on your Application-Pool for the web application and select "Advanced Settings".

3) Set "Rapid-Fail Protection" -> "Enabled" to False.

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I had this problem and when looking for the fix in the IIS, I realized that just this AppPool had the Identity User Account different. So I change the Identity User Account, started the Pool again and it works!

Hope it helps!

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I just had this same symptom on some VMs due to "The trust relationship between this workstation and the primary domain failed" - the solution there is to leave and then re-join the domain. In this case, I was able to connect via the VM console but got the trust error via remote desktop.

http://support.microsoft.com/kb/162797

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I tried everything I found on internet but whenever I opened central administration the app pool would stop. Running SharePoint Configuration Wizard fixed everything for me.

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