modifier.setTill( requestedEndTime );
KerberosTime requestedRenewTillTime = new KerberosTime( now + KerberosTime.WEEK / 2 );
modifier.setRtime( requestedRenewTillTime );
RequestBody requestBody = modifier.getRequestBody();
KdcRequest message = getKdcRequest( tgt, requestBody );
handler.messageReceived( session, message );
ErrorMessage error = ( ErrorMessage ) session.getMessage();