db watchdog process 100% and not recovering

[bxabi]

Hi, I have an issue since I moved the database to an external server.
Sometimes the db watchdog process sends me an alert, and never recovering, although the database obviously works.
I can see on the graphs that this process is busy at 100%.
Restarting the zabbix-server service fixes it, but it should recover by itself.
(I'm not sure why this error comes at the first place, the database is probably not failing, it is an an amazon ec2).
Also the internet connection did not fail, I was talking on skype when I got the error.

[ingus.vilnis]

Hello and welcome to Zabbix forums!

Please check what you have set for DBHost parameter in your zabbix_server.conf file. If you have DNS name there and you know that the IP address behind that amazon DNS will never change then try using IP address there. You might run into this issue because DNS server for some reason was not reachable thus resulting in an error.

Having IP addresses set for all communication between all Zabbix components is one of the keys to ensure all parts can reach each other successfully. Quite often DNS names are not available plus it also takes one extra step to pass all requests through DNS server each time Zabbix sends or receives any data.

If you already have IP address set then please check Zabbix server log files if you can find any DB or network related lines at the moment when DB watchdog hit 100%.

Best Regards,
Ingus