Restart Application pool again and again

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MVC3

IIS7.5

We are currently facing a problem that, our application is going in long pooling and doesn’t respond to user’s request.

Our current application infrastructure is:-

1) One load balancer which is a layer 4 device with client affinity on.

2) Two web servers having IIS 7.5 with 24 core and 16 GB ram.

3) Separate database servers.

For session management we are using “StateServer“, using ASP_STATE service running in our database server as a window service.

We had created 7 worker processes on each server for the application pool in same domain.

We have examined that when ever our application is hang the requests in worker process are in “RequestAcquireState” and workerprocess is not releasing the requests