Rebalance button not enabled post Quorum Loss failover even when indexing has partitioned indexes

Steps to Repro
1. Create a 6 node cluster. (3 kv + 3 index,n1ql). See
2. Create 2 partition indexes using the following commands. See

CREATE INDEX idx_pe11 ON `travel-sample`(airline, sourceairport, destinationairport)

 PARTITION BY HASH(airline) WITH {"num_partition":9};

CREATE INDEX idx_pe12 ON `travel-sample`(airline, sourceairport, destinationairport)

 PARTITION BY HASH(airline) WITH {"num_partition":9};

3. Bring down 4 nodes. (2 kv + 2 index,n1ql) using systemctl stop couchbase-server.
4. QL failover all the 4 nodes. See

All the 4 nodes are out of the cluster. However rebalance button is not enabled.

I think it's because there is only one KV node in the cluster and we think there is nothing to redistribute. However, as seen from post QL failover we can see there is only 3 partitions now and a rebalance would be required to rebuild other 6 partitions. For this to happen we need to have rebalance button enabled which is not the case here. See

cc: Amit Kulkarni