Error "HTTP Error 503.2 - Service Unavailable. The serverRuntime@appConcurrentRequestLimit setting is being exceeded".

Question

Whenever we are running the application, it is giving the error "While running the application, getting the error "HTTP Error 503.2 - Service Unavailable. The serverRuntime@appConcurrentRequestLimit setting is being exceeded". How to resolve the problem?

Answer 1

Hi @Kallol Saha ,

Probably, there is something with an IIS worker process. It handles requests.

In IIS Manager, select the server node from the tree, then the "Worker Processes" feature icon, then right-click the application pool and select "View current requests".

Answer 2

@Kallol Saha

There are many reasons for this error, you can try below methods:

1. The adjusting IIS application pool queue length

IIS Manager > ApplicationPools > Advanced Settings > Queue Length

2. Adjust the IIS appConcurrentRequestLimit settings

In the %systemroot%\System32\inetsrv\config\applicationHost.config can change this setting:

<serverRuntime appConcurrentRequestLimit="100000" />

3. Adjust in machine.config processModel requestQueueLimit provided

<processModel enable="true" requestQueueLimit="100000"/>

Reference article: http://technet.microsoft.com/en-us/library/dd425294(office.13).aspx

4. Run the command to take effect

net stop http & net start http & iisreset

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