Zabbix 7.2.3 found discovery rule became not supported: Timeout while retrieving data

[siggnager]

Hi,

I’ve encountered an issue after using to Zabbix version 7.2.3.
My discovery rule keeps showing the error: "became not supported: Timeout while retrieving data"

When I click "Execute now", it temporarily changes to "became supported", but then it eventually goes back to "became not supported" again.

This issue never happened when I was using Zabbix version 5.

Has anyone experienced this before, or does anyone have suggestions on how to resolve this issue?

Thanks in advance.

## example log from /var/log/zabbix/zabbix_server.log ##
2138946:20250527:005924.261 discovery rule "hostname:entity.discovery" became not supported: Timeout while retrieving data from "ip_address:161".
2138946:20250527:015911.733 discovery rule "hostname:entity.discovery" became supported
2277502:20250527:065922.297 discovery rule "hostname:entity.discovery" became not supported: Timeout while retrieving data from "ip_address:161".
2277501:20250527:085913.023 discovery rule "hostname:entity.discovery" became supported
185388:20250528:105916.445 discovery rule "hostname:entity.discovery" became not supported: Timeout while retrieving data from "ip_address:161".
185388:20250528:110431.080 discovery rule "hostname:entity.discovery" became supported
185388:20250528:115917.529 discovery rule "hostname:entity.discovery" became not supported: Timeout while retrieving data from "ip_address:161".

## parameter ##
StartPollers=150
StartPollersUnreachable=50
StartPingers=100
StartDiscoverers=20
CacheSize=4G
HistoryCacheSize=512M
HistoryIndexCacheSize=512M
TrendCacheSize=512M
ValueCacheSize=4G
UnreachablePeriod=60
UnavailableDelay=120
UnreachableDelay=30
Timeout=4
StartSNMPPollers=150