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gpracer69
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Aug 29, 2017

Why am I seeing so many pending active sessions in my APM?

I am currently seeing about 1,000 pending active sessions on my APM. I am running APM 13.0.0 Build 1645. I have a Access Profile that keeps disallowing users access because the Max In Progress Sessions Per Client IP limit was being reached. I had it set to 1000 previously and users were being blocked because I had about 1000 pending active sessions to that Access Profile. The pending active sessions have a user of n/a and they are all coming from the NAT IP addresses of my users. When I look at the session details for the pending active sessions they all just have two lines:

 

Received User-Agent header: ..... New session from client IP x.x.x.x at VIP x.x.x.x Listener

 

They persist for quite a while before dropping off. I can't find anything in the configuration that would be causing this to happen. Has anyone experience this kind of activity in the APM before? I hate having to modify the Access Profile setting just to get around this.