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Editorial Team
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Asked: 2026-05-23T19:54:19+00:00

I have asp.net application runs on iis 7. Until today everything works fine (for

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I have asp.net application runs on iis 7. Until today everything works fine (for a few months).
Today I got a strange problem. Every couple of minutes the site crashes and I get “error 503 service unavailable”. When making IISRESET the problem solved until the next crush. When opening the event viewer on the server, I found that there is an error every few minutes that related to the w3wp proccess. I believe that this is makes the error 503 I get but I don’t know why it happens and how can I solve this.

Here is the error in the event viewer:
enter image description here

Here is the problem itself:
enter image description here

I really appriciate any assistance.

UPDATE:
After looking in the exent viewer I saw there is stack overflow somewhere in my application – but I don’t know how I get the full exception in order to find where it accurs. Any ideas?
I found this somewhere: this. Does this will help me to find out?

UPDATE2:
The problem is one of my webservices makes stackoverflow exception. I don;t know which one. How can I get the exception and the stack trace? How can I trace my webservices?

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1 Answer

  1. Editorial Team

    A 503 error means your server is temporarly unavailable due to overload. This probably means you are suddenly getting a lot of users, while the hosted websites are not well-optimized (e.g. too many HTTP requests per page).

    EDIT: Try enabling debugging mode in IIS, with the Log Errors to NT Log option.
    http://technet.microsoft.com/en-us/library/cc731782.aspx

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