sessionKillMessageToSend.setSessionAsUUID(this.sessionKey);
final RexProMessage rcvMessage = sendRequest(sessionKillMessageToSend, 3);
// response message will have an EMPTY_SESSION
if (rcvMessage instanceof SessionResponseMessage) {
this.sessionKey = rcvMessage.sessionAsUUID();
}
rexProConnection.close();
rexProConnection = null;
}