One of my connection servers is in unknown state in admin console.
There are extremely big log files that are created automatically on location c:\ProgramData\VMware\VDM\logs and after very short period of time c partition is full.
This is the log that is repeating: ERROR (0384-1B84) <Broker JMS Certificate Generator> [BrokerCertificateGeneration] Certificate Cycling error occurred: com/vmware/vdi/messagesecurity/Identity
This server is not operational - how to fix this?
As long as you have multiple connection servers it should be easy to fix. When C: becomes full a number of strange things may occur, so I would try the following: Uninstall Horizon Connection Server and install it again. If that doesn't work, deploy a new VM and replace the old one.
Were you able to resolve your issues? What version of the connection server are you having issues with? We experienced the same issue with versions 7.12 and 8.0. Unfortunately, we had only one for each installation.
The strange issue is that it happened on both versions of the connection server and they both filled the drive with logs similar to the ones you mentioned. The logs under c:\Program Files\vmware\Broker also had similar behavior. We tried to uninstalled and reinstalled but that did not work. We ended having to upgrade to the latest version and that appeared to resolve our issues.