Since upgrade from 5.0 to 5.2 I am experiencing increased amount of log messages from the Zabbix agent. Every 5 seconds I get messages about all the unsupported check types, for example:

active check "net.if.in[eth1,bytes]" is not supported: Cannot find information for this network interface in /proc/net/dev

In the previous version (5.0) this type of message was displayed only at startup (or every so often that it did not create excess logs), instead in 5.2 this happens every 5 seconds.

I can't really fiddle with specific settings for all my servers - some of them do have an eth1 and some of them don't.

The only "workaround" is to set DebugLevel to 2 and lower and that seems to get rid of these messages, but not sure at what cost.

Could we get the old behavior - report once - back?