Upgrade to 7.4.4 zabbix_agent2 results in 100% CPU usage

[ams047]

I upgraded zabbix_agent2 from 7.4.3-1 to 7.4.4-1 on my Debian 11 and 12 hosts, and openSUSE 15.6 and within a minute it claimed 100%+ CPU usage across all hosts providing databases (mysql and postgresql). Those that are not running databases were unaffected.

My solution was to downgrade back down to 7.4.3-1 on the affected hosts and all is well again.

Anyone else affected by this issue - is there something in their cfg that needed upgrading, or should I just file a bug?

[jonad2002]

I too am seeing precisely this behavior. 100% CPU for zabbix_agent2 7.4.4 and MySQL. I can state that this occurs for a fresh uncustomized configuration of MySQL as well as an uncustomized agent2 .conf. I bumped up debug = 4 and did not see anything in that output that was unexpected. Just the agent2 process pegged for CPU.

[d2inco]

Hate to add a "me too", but: me too. Zabbix-agent2, on a host with only Mysql and Redis running. Running as an "active agent".

[stoege]

same here ... downgrade to 7.4.3 solved the problem. server is running on debian 12 with mariadb 10.11.14.

[cerealx]

Same here on 2 hosts with mariadb 11.8.3 on debian 12 and debian 13

[manusfreedom]

Same here with Zabbix-agent2 and MariaDB (11.4), but on Zabbix 7.0.20.

[brechsteiner]

Same here with zabbix-agent2

• Zabbix Agent2 7.0.20-1+debian12
• MariaDB Server 10.11.14+maria~deb12

[brechsteiner]

Has anyone already created a ticket on support.zabbix.com?

[jonad2002]

Given that I am one of the unwashed heathen (e.g. non-paying customer as this is a homelab installation) :-) I myself can't open tickets -- but someone already has: https://support.zabbix.com/browse/ZBX-27170

[Calypso]

Just got zabbix agent 2 v 7.4.5 on the affected hosts and the issue is still present

[jonad2002]

Confirmed. I tried 7.4.5-1. Agent2 still pegged 100%. Rolled back again to 7.4.3-1.

[aaxvig]

Same on 7.0.21, Debian 13. PostgreSQL and MariaDB are installed--both from stock Debian packages. `apt install zabbix-agent2=1:7.0.19-1+debian13` seems to have fixed it.

[cerealx]

Fixed for me with the latest minor version update

[jonad2002]

Confirmed: 7.0.21-2, 7.4.5-2 -- I didn't test 7.0.21, but the -2 iteration of 7.4.5 resolved for my environments.

[aaxvig]

Relevant bug is ZBX-27156.