Having a strange intermittent issue with my 1 master, 3 slave solr 4.2 setup. On occasion, after indexing the master and replicating across the three slaves, each slave will start reporting they are one generation ahead (525 vs. 524 on the master) and thus out of sync. Replication runs appear to do nothing, and it seems to not really be affecting performance, it's just tickling my admin nerves.
Any suggestions of what to look at? Just upgrade solr perhaps? 4.2 might be getting rather old...
