Problem:
Zabbix proxies do not know which assigned hosts and items are in “No data collection” maintenance.

Because of this, proxy-side queue and missing data metrics include checks that should not be collected. This produces false positive proxy health alerts.

Observed inconsistency:

• The server-side queue view shows no missing data.
• The proxy health trigger reports missing data.
• There is no clean way to suppress the trigger only for hosts/items in “No data collection” maintenance.

Expected behavior:
Zabbix proxies should receive the relevant “No data collection” maintenance state from the server.

During the maintenance window, proxies should skip polling affected hosts/items.

Proxy-side queue and missing data metrics should exclude checks affected by “No data collection” maintenance.

Impact:
Proxy health monitoring becomes unreliable, because the same trigger is needed for real proxy queue issues but also fires during valid “No data collection” maintenance.

Use case:
Hosts are provisioned before they are ready for monitoring and placed into “No data collection” maintenance. The server-side queue is clean, but the proxy health trigger still fires. This alert is false positive and not actionable.