Zabbix Log Monitoring - Duplicate alerts

view story

http://serverfault.com – I am configured Zabbix to monitor my Jboss Server logs for Erros and exclude some know errors. This setup is working with one issue. Zabbix will send me alerts when there is a new "ERROR" entry in the log file. But sometimes I get multiple alerts for the same event. For example, I got 5 alerts with the same time stamp "2012-06-25 07:55:56,864 ERROR". The duplicate alerts count is not constant, sometimes I get 2 sometimes 5 or 11. I checked the Monitoring > Latest data in the GUI, and found that there is no duplicate entries. I have given my configuration of the log monitoring below. I am u (HowTos)