I tried many settings with "Rule-based Replica Placement" on Solr 6.5.1 and came to the conclusion that it is not working at all.
My test setup is 6 nodes on 3 servers (port 8983 and 7574 on each server). The call to create a new collection is "http://localhost:8983/solr/admin/collections?action=CREATE&name=boss&; collection.configName=boss_configs&numShards=3&replicationFactor=2& maxShardsPerNode=1&rule=shard:shard1,replica:<2,port:8983" With "rule=shard:shard1,replica:<2,port:8983" I expect that shard1 has only nodes with port 8983 _OR_ it shoud fail due to "strict mode" because the fuzzy operator "~" it not set. The result of the call is: shard1 --> server2:7574 / server1:8983 shard2 --> server1:7574 / server3:8983 shard3 --> server2:8983 / server3:7574 The expected result should be (at least!!!) shard1 --> server_x:8983 / server_y:8983 where "_x" and "_y" can be anything between 1 and 3 but must be different. I think the problem is somewhere in "class ReplicaAssigner" with "tryAllPermutations" and "tryAPermutationOfRules". Regards Bernd
