I see that in some cases, indexes get created without replicas. Not really sure when this happens, so requires some investigation. I've attached the cluster config and indexes page screenshots. As you can see from the screenshots the index 'magmaname' has been created without any replica.

The current state of the dataplane is as follows:

• 4 indexer nodes, 3 KV nodes, 2 FTS, and 2 Query nodes.

Not really sure if it's relevant to this bug, but as per an earlier comment by Varun Velamuri, if there are 2 indexer nodes in the same server group, no replicas get created. In the real world scenario, there is a possibility that they end up on the same server group as there are only a limited no of server groups (auto-scaling groups in the AWS world). We will either need to revisit the planner implementation.

Log bundles ->

s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@5iq8ka1ekrc3bxws.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@8ayl-ap4iho1gqre.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@9vidso5p5m92qwyz.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@bp6iae4pc9o529fo.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@e2cullprghoxw9xs.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@fnkl6e7opwunhr0o.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@fnnqxiyl9p8eqpa6.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@jynioof-jbxixibl.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@q9jw3pguekwzvei3.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@qn2jesemsw1javo9.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip
s3://cb-customers-secure/indexwithoutreplica/2022-11-11/collectinfo-2022-11-11t121258-ns_1@xaqh0wrx6tyxx2v5.hsvngcdq1x5cqze2.sandbox.nonprod-project-avengers.com.zip

Screenshots also attached.