Improve error message for geoip filter

[KVInventoR]

I see in logs string: gogstash_filter_geoip2_error, this is related to private subnets.
Is it possible to improve output with error message for geoip filter?

gogstash_filter_geoip2_private_skipped - for private subnets
gogstash_filter_geoip2_error - use for all another errors in geoip filter.

I would like to have more control over conditions during next steps.

[helgeolav]

Hi I think you should turn on the option «skip_private». This option is off by default. With this option on you will not get an error when looking up private IP adresses (or any other addresses that you have defined as private, such as your own public IP). With this option on you have three possible outcomes: 1. No geoip field, indicating that it was an IP in the private range. 2. a geoip field and a successful lookup. 3. an error - should not happen.