Hello,

I have deployed a SolrCloud (solr 5.5.0) on hdfs using cloudera 5.4.7. The
cloud has 86 nodes.

This is my config for the collection

numShards=80
ReplicationFactor=1
maxShardsPerNode=1
autoAddReplica=true

I recently decommissioned a node to resolve some disk issues. The shard
that was being hosted on that host is now being shown as "gone" on the solr
admin UI.

The got the cluster status using the collection API. It says
shard: active, replica: down

The overseer does not seem to be creating an extra core even though
autoAddReplica=true (
https://cwiki.apache.org/confluence/display/solr/Running+Solr+on+HDFS).

Is this happening because the overseer sees the shard as active as
suggested by the cluster status?
If yes, is "autoAddReplica" not reliable? should I add a replica for this
shard when such cases arise?

Thanks!

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