There are several reasons why the "cannot write to IPC socket: Broken pipe" error may occur in Zabbix when using UDP:
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: This error is commonly reported after migrating or upgrading to Zabbix 6.0 or 7.0. It can sometimes stem from version mismatches between the Zabbix Agent 2 and its underlying plugin support packages. Troubleshooting and Resolution Steps cannot write to IPC socket: Broken pipe - ZABBIX Forums zabbix cannot write to ipc socket broken pipe upd