The zabbix agent native interface provides information whether the key is being supported or not outputting ZBX_NOTSUPOPRTED string to the zabbix server, which then reacts to the information and temporarily disables the key check for that particular host.

This funcionality does not seem to be implemented for external checks - keys calling external scripts in externalscripts directory. This is a very nice to have feature. We do have Oracle, Weblogic and LUSTRE fs monitoring implemented in Zabbix, however we would really appreciate to have this feature enabled in zabbix server.