FYI - This error rsHttpRuntimeClientDisconnectionError - I have been able to cause this error repeatedly by starting a SSRS report from the http://server.com/reports folder and waiting aproximately 10 seconds and then existing from the IE browser. I see the error in the RS log. Thought this may be of use to someone.

Hi RudyCat,

Based on my research, the rsHttpRuntimeClientDisconnectionError error may occur if:

1. Reporting Services creates the report and then goes to send it back to the client.
2. Reporting Services finds out that the connection has been closed and responds with the disconnection error.

To resolve the issue, we can try to modify the TCP profile applied to the VIP. 

Additionally, the issue may also occur due to a RESET coming from something between Report Server and the custom application. For example, an F5 NLB times these connections out on the either an HTTP or TCP level.

Hope this helps.

Regards,
Mike Yin

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Hy Mike

I'm with same issue, but in version 2012, I'm using a LLB of CISCO 
How could I modify the TCP profile applied to the VIP?

Thanks 

Thiago