Service Unavailable. HTTP Error 503. The service is unavailable.

Question

Service Unavailable. HTTP Error 503. The service is unavailable.

Kurakula, Julia 26

Site runs fine locally but when it is published in the server, Web app shows "Service Unavailable- HTTP Error 503. The service is unavailable".

I check the WCF service. It is available and it is running in the IIS.

I checked the basic binding settings in the IIS, it gives error for authentication :"The user name or password is incorrect. (Exception from HRESULT: 0x8007052E)"

and for authorization it says: "The credentials used to access the specified physical path are invalid. Verify the credentials and test these settings again."

I don't get it.. please help

AgaveJoe 30,126 Reputation points

2022-11-15T13:41:40.22+00:00

The error is usually from an invalid SQL login but it could be related to other access rights. Keep in mind, we cannot see your code and have no idea how your code works. If the connection string is using integrated security then it works on the local machine because the application is running under your account and you are probably the administrator. The connection string fails on the IIS because the application is running under the application pool identity.

To fix this issue either set the application pool identity to run under a service account that has a SQL login or create a SQL login and update the connection string to use the newly created SQL login.
Kurakula, Julia 26 Reputation points

2022-11-15T13:52:45.123+00:00

The application pool is using Integrated security in the IIS server.. in the published server.
AgaveJoe 30,126 Reputation points

2022-11-15T15:18:09.783+00:00

The application pool is using Integrated security in the IIS server.. in the published server.

There is no such setting in the application pool configuration. Do you mean the application pool is running under a service account? If so, then the service account is either missing from SQL logins or the account does not have the appropriate rights.

Again, we cannot see your code and have no idea how your security is designed to function. Perhaps you have a peer that can review your code and IIS configuration?
Sam Wu-MSFT 7,561 Reputation points Microsoft External Staff

2022-11-16T06:04:15.533+00:00

@Kurakula, Julia

The error information doesn't show the key factor that lead to this 503 error, you can enable failed request tracing, this will generate detail log file, which will help you to identify the problem.

This link provide the method to enable failed request tracing to capture the detailed error:

https://www.iis.net/learn/troubleshoot/using-failed-request-tracing/troubleshooting-failed-requests-using-tracing-in-iis

2 answers

Your answer

AgaveJoe 30,126 Reputation points

2022-11-15T13:41:40.22+00:00

The error is usually from an invalid SQL login but it could be related to other access rights. Keep in mind, we cannot see your code and have no idea how your code works. If the connection string is using integrated security then it works on the local machine because the application is running under your account and you are probably the administrator. The connection string fails on the IIS because the application is running under the application pool identity.

To fix this issue either set the application pool identity to run under a service account that has a SQL login or create a SQL login and update the connection string to use the newly created SQL login.
Kurakula, Julia 26 Reputation points

2022-11-15T13:52:45.123+00:00

The application pool is using Integrated security in the IIS server.. in the published server.
AgaveJoe 30,126 Reputation points

2022-11-15T15:18:09.783+00:00

The application pool is using Integrated security in the IIS server.. in the published server.

There is no such setting in the application pool configuration. Do you mean the application pool is running under a service account? If so, then the service account is either missing from SQL logins or the account does not have the appropriate rights.

Again, we cannot see your code and have no idea how your security is designed to function. Perhaps you have a peer that can review your code and IIS configuration?
Sam Wu-MSFT 7,561 Reputation points Microsoft External Staff

2022-11-16T06:04:15.533+00:00

@Kurakula, Julia

The error information doesn't show the key factor that lead to this 503 error, you can enable failed request tracing, this will generate detail log file, which will help you to identify the problem.

This link provide the method to enable failed request tracing to capture the detailed error:

https://www.iis.net/learn/troubleshoot/using-failed-request-tracing/troubleshooting-failed-requests-using-tracing-in-iis

Answer 1

Bruce (SqlWork.com) 77,686 Volunteer Moderator

most likely the pool account password is wrong, or the pool account does not have access to application folder

Answer 2

Amit Singh 5,306

The solution is the SSL certificate seemed to have come off of the Exchange Backend website. I selected the Exchange certificate on the IIS site, and it started working. For all the details, please see http://www.experts-exchange.com/questions/28699498/Exchange-2013-ECP-OWA-Outlook-all-failing-503-Service-Unavailable.html

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Service Unavailable. HTTP Error 503. The service is unavailable.

2 answers

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