Dear Team,

After Upgrading my Master node & Child node from 2.0.8 to 2.2.2. Everything works fine except below

Issue:

The Mail trigger alert & Chat trigger Alert for Child node agent is coming with UNKNOWN instead of hostname

For example:
I have stopped my Child Node's zabbix agent service, then i got the below Triggers

Email Trigger Alert:
PROBLEM: Zabbix agent on UNKNOWN is unreachable for 5 minutes

Trigger: Zabbix agent on UNKNOWN is unreachable for 5 minutes
Trigger status: PROBLEM
Trigger severity: Average
Trigger URL:

Item values:

1. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
2. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
3. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN

Jabber Trigger Alert:

rigger: Zabbix agent on UNKNOWN is unreachable for 5 minutes
Trigger status: PROBLEM
Trigger severity: Average
Trigger URL:

Item values:

1. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
2. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
3. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN

Note: The zabbix interface seems fine for both Master Node interface & Child Node interface.

Best regards,
Md. Mansoor