I spent some time troubleshooting a common ST problem recently. Everything on a new clustered server appeared fine but when starting a meeting on the new server it would fail to connect - the start up messages show ST_HOST_UNREACHABLE. Now that's a fairly common problem if there are DNS issues or even with LTPA tokens called something other than LTPAToken but nothing I could find looked wrong. To avoid running around in circles endlessly I asked Carl if he could think of anything and using the java debugger when the meeting launched we could see that the hostname it was using definitely looked wrong (it was only the domain part not the host part) so having definitively narrowed it down to a DNS issue I carried on looking. I eventually found the problem in a replication conflict in the cluster information document in STConfig.nsf - deleted the spare document and restarted and it was all fixed.
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