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I am working on an application of ColdFusion 9 and IIS 7. The application was working fine but suddenly an error occurred on the page when a request was sent to a CFC page. Other CFM pages are working fine.

Here is the error message displayed in the Console.

503 (Remote CFC request timed out waiting to execute.)

Here is the message when I hit the same URL from a browser.

The service is unavailable.

A few days ago I faced the same issue which I fixed by restarting but now it has happened again. I would like to permanently fix this issue.

Ajay Bhagat
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  • Ajay - this error is the result of reaching your "simultaneous request limit" and your threads queuing causing the server to hang. To ask _why_ it happens is way to broad a question. I can happen for many reasons - networking, database locks, file i/o, basic hardware issues etc. You will need more clues. I suggest you monitor with fusion reactor and learn more about performance. – Mark A Kruger Nov 05 '15 at 18:29
  • @MarkAKruger, Thank for the reply. i have checked the Worker Process of IIS Manager, there are only few requests. So the issue is not due to reaching "Simultaneous request limit". – Ajay Bhagat Nov 05 '15 at 19:38
  • What do your log files show? – Miguel-F Nov 05 '15 at 21:30
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    You will not see it there Ajay - as I said you need JAVA introspection. The connector in fact does very little work and a few IIS worker process will not tell you what you need to know. You will need either the server monitor (a part of CF enterprise) or fusion reactor. They have a trial version. Also look at the *out.logs found in the runtime logs directory. You may find some clues there as to the initial issue. I'm not telling you something off the top of my head. I and 2 of my employees do this for a living all week long. :) – Mark A Kruger Nov 05 '15 at 23:27

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