The eserver must be able to establish connections to the aservers to perform cache flush updates. If the eserver cannot make this connection, cache flush events will begin to queue on the eserver. If this queue cannot be cleared, it may result in a gradual loss of available memory on the eserver.
Ensure that the cleartrust.eserver.dispatcher_list= parameter in the eserver.conf file is correct. Ensure that the eserver is able to connect to the dispatcher and aservers.