Slow database performance is the #1 silent killer of Zabbix IPC sockets. If the History Syncer process can't write to the database fast enough, the IPC queues back up, triggering the broken pipe.
Check if all Zabbix daemons are running with ps ax | grep zabbix . 3. Adjust Preprocessing Settings zabbix cannot write to ipc socket broken pipe upd
If you see kernel: Out of memory: Kill process [PID] (zabbix_server) , your preprocessing workers are crashing due to oversized metrics. Step 2: Check Zabbix Internal Process Busy % Slow database performance is the #1 silent killer