Three members, primary & secondary - and a third one that's "OTHER" - I can't find any info on that state, not sure what to do, I've restarted the instance, but it always comes-up the same. Can find no documentation on that state.
I'm new to replica sets - and any help would be appreciated.
For posterity - the problem is that the instance can't sync with the primary or secondary because it was down too long. It goes into a state of trying primary and secondary, over-and-over, never being allowed to sync. This eventually created an 8GB log file, which I couldn't open, so I couldn't see the problem at the time. Solution apparently is to stop the errant mongo instance - dump its data - and start it again, as if it was a new member of the replica set.