Expression [{653}=1|{654}=0] cannot be evaluated: Evaluation failed for function: avg

[lstewart]

I'm getting a ton of these types of messages in zabbix_server.log but I don't know how to trace down which items or triggers is causing them. There are multiple numbers within the {} brackets.

Example entries:
16708:20101108:101030.036 Evaluation failed for function: avg
16708:20101108:101030.036 Expression [{613}=1|{614}=0] cannot be evaluated: Evaluation failed for function: avg
16708:20101108:101030.037 Evaluation failed for function: avg
16708:20101108:101030.037 Expression [{623}=1|{624}=0] cannot be evaluated: Evaluation failed for function: avg
16708:20101108:101030.038 Evaluation failed for function: avg
16708:20101108:101030.038 Expression [{633}=1|{634}=0] cannot be evaluated: Evaluation failed for function: avg
16708:20101108:101030.038 Evaluation failed for function: avg
16708:20101108:101030.038 Expression [{643}=1|{644}=0] cannot be evaluated: Evaluation failed for function: avg
16708:20101108:101030.039 Evaluation failed for function: avg
16708:20101108:101030.039 Expression [{653}=1|{654}=0] cannot be evaluated: Evaluation failed for function: avg
16708:20101108:101030.040 Evaluation failed for function: avg
16708:20101108:101030.040 Expression [{663}=1|{664}=0] cannot be evaluated: Evaluation failed for function: avg

What are the numbers within the {}'s and what exactly is the problem here?

I recently upgraded from 1.8.2 to 1.8.3. I'm not 100% sure if these were being logged before the upgrade though, they may have been.

[bashman]

It seems to be this issue: https://support.zabbix.com/browse/ZBX-2922