After upgrade we are receiving this error UFMA - [::1]:8089 in REST API call?

[mpavlas]

Hi,
after upgrade to Splunk 9.0.2 the UFMA started to use https://[::1]:8089/services/deployment/server/clients?count=0 for REST API call which resulted into 400 Host header contains invalid characters.

I was able to 'fix' this by adding connectUsingIpVersion = 4-first to [general] section in server.conf.

What would be the correct way?

[justynap_ldz]

Hi @mpavlas , we have similar issue after upgrading to 8.2.9. 
Have you already fixed the issue or contacted Splunk Support by any chance?

Greetings,
Justyna