zabbix_server log "only partial data received, cannot retrieve OID"... timed out

[Azolotl]

Hi,
I'm using Zabbix for monitoring a number of systems via SNMP.

Zabbix_server.log is flooded by messages like
error reason for "<systemname>:net.if.type[ifType.166]" changed: only partial data received, cannot retrieve OID: '.1.3.6.1.2.1.31.1.1.1.1.151' from <ipaddress>:161]: timed out
there is not only 1 message per host, but a multitude (one per interface), which lets log grow quite fast.

Weirdly, monitoring of the systems that the log is about generally works.

I'm running a slightly distributed system with
Zabbix host A : Web interface + Zabbix Server 7.4.11
Zabbix host B: Zabbix Proxy 7.4.11

It seems that the messages are generated by zabbix_proxy (which is monitoring those hosts) and then sent to the server?

Already tried to increase "Timeout" on both server and proxy --> no change.

Any ideas?
Best regards

[Azolotl]

I think, I found it.
There is a SNMP timeout defined in GUI, under General->Timeouts, which defaults to 3 Seconds, that I didn't notice before.

It seems that the "Timeout" setting in the zabbix_server.conf / zabbix_proxy.conf file is not really too relevant anymore.

There is some explanation in a bug notice for Zabbix 7.0 https://support.zabbix.com/browse/ZBX-25241 .