icm/keep_alive_timeout 

This parameter refers to the "keep-alive-feature" of HTTP1.1. This means that if within this time interval new data arrives over the network from the partner, the ICM attempts to keep the connection open once it has been established. If, for the existing connection, there is no further communication within the specified time period, the ICM terminates the connection. This avoids having to keep establishing and terminating costly network connections.

Value Range	Unit	Default Setting
1 – 9,999,999	Seconds	60

If you set the parameter to 1, switch the timeout fully off. In this case the connection is never closed by the ICM.

It makes no sense to set the value to zero, as the ICM would then close the connection immediately.

Requirements

You can override the standard value of the timeout for each service using the icm/server_port_<xx> parameter.

Note that the user context in the work process is not closed after this timeout interval has expired. The user context is closed only after the time interval specified in the profile parameter rdisp/plugin_auto_logout has expired. If rdisp/plugin_auto_logout = 0 is set, the context in the work process is not deleted at all.