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Type:
Problem report
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Resolution: Unresolved
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Priority:
Trivial
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None
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Affects Version/s: None
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Component/s: None
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None
Hi, I am experiencing simmiliar issue to ZBX-24658. But we are using only one proxy so there is no proxy load balancing.
But the issue looks the same. Active checks are working fine for some amount of time. We are experiencing issues when a active checks become red (Active checks Not available) and they stop working. When I remove the host from the zabbix and create it again it works. When I unlink and clear template and link it back again it again works.
I am going to restart the agent and see if it resolves the issue to and will report.
xxxx@hos_name:~$ curl -v telnet://[zabbix_proxy_IPv6]:10051
- Trying [zabbix_proxy_IPv6]:10051...
- Connected to zabbix_proxy_IPv6 (zabbix_proxy_IPv6) port 10051 (#0)
^C
zabbix server: 7.0.3
zabbix proxy: 7.0.3
zabbix agent version: 7.2.12
these are our agent log messages:
2026/01/29 10:46:09.108379 [101] cannot receive data from [zabbix_proxy_DNS:10051]: Cannot read message: 'read tcp [zabbix_agent_IPv6]:57233->[zabbix_proxy_IPv6]:10051: i/o timeout'2026/01/29 10:46:09.108398 [101] connection closed2026/01/29 10:46:09.108401 [101] active check configuration update from host [host_name] started to fail2026/01/29 10:47:09.023920 [101] active check configuration update from [zabbix_proxy_DNS:10051] is working again2026/01/29 23:52:12.017776 [101] cannot receive data from [zabbix_proxy_DNS:10051]: Cannot read message: 'read tcp [zabbix_agent_IPv6]:34617->[zabbix_proxy_IPv6]:10051: i/o timeout'2026/01/29 23:52:12.017809 [101] connection closed2026/01/29 23:52:12.017816 [101] active check configuration update from host [host_name] started to fail2026/01/29 23:53:12.022268 [101] active check configuration update from [zabbix_proxy_DNS:10051] is working again2026/01/30 03:32:15.167064 [101] cannot receive data from [zabbix_proxy_DNS:10051]: Cannot read message: 'read tcp [zabbix_agent_IPv6]:55165->[zabbix_proxy_IPv6]:10051: i/o timeout'2026/01/30 03:32:15.167103 [101] connection closed2026/01/30 03:32:15.167108 [101] active check configuration update from host [host_name] started to fail2026/01/30 03:33:15.025278 [101] active check configuration update from [zabbix_proxy_DNS:10051] is working again2026/01/30 03:35:18.001865 [101] cannot connect to [zabbix_proxy_DNS:10051]: dial tcp :0->[zabbix_proxy_IPv6]:10051: i/o timeout2026/01/30 03:35:18.002086 [101] active check configuration update from host [host_name] started to fail2026/01/30 03:36:18.023103 [101] active check configuration update from [zabbix_proxy_DNS:10051] is working again2026/01/30 10:38:22.686224 [101] cannot receive data from [zabbix_proxy_DNS:10051]: Cannot read message: 'read tcp zabbix_agent_IPv4:39459->zabbix_proxy_IPv4:10051: i/o timeout'2026/01/30 10:38:22.686241 [101] connection closed2026/01/30 10:38:22.686245 [101] active check configuration update from host [host_name] started to fail2026/01/30 10:39:22.021969 [101] active check configuration update from [zabbix_proxy_DNS:10051] is working again