During shutdown of Zabbix server it stalled. All Zabbix server proc titles said terminated except for snmp poller, configuration syncer worker, ha manager, and service manager. When I ran kill -9 against the PID for snmp poller, everything else completed, trends were sync'd, and shutdown completed. Prior to running the kill -9 I waited about 10+ minutes. The whole zabbix server was idle (no DB inserts for trends syncing was visible) which seems to confirm the main PID was waiting on the snmp poller.

 

The proc title for snmp poller only said, got 133 values, queued 834 in 5 sec, awaiting 867. I probably should have tried to profile, diaginfo, perf top or strace the PID, but I wasn't thinking to do that at the time.

 

Apologies for not having more detail, but I wanted to get this ticket submitted in case this was seen before.