This issue is related to Apache 'Prefork' mode.
In 'Prefork' mode, a single control process is responsible for launching child processes which listen for connections and serve them when they arrive.
Apache httpd always tries to maintain several spare or idle server processes, which stand ready to serve incoming requests. In this way, clients do not need to wait for a new child processes to be forked before their requests can be served.As this working, several idle processes are likely to be existing.
By this reason, Policy Server try to close idle sockets and send RST packets to WebAgent, this occur connection issue between WebAgent and Policy Server.