I'm trying to create a collection starting with only one shard (numShards=1) using a compositeID router. The purpose is to start small and begin splitting shards when the index grows larger. The shard created gets a weird range value: 80000000-7fffffff, which doesn't look effective. Indeed, if a try to import some documents using a DIH, none gets added.
If I create the same collection with 2 shards, the ranges seem more logical (0-7fffffff & 80000000-ffffffff). In this case documents are indexed correctly. Is this behavior by design, i.e. is a minimum of 2 shards required? If not, how can I create a working collection with a single shard? This is Solr-6.0.0 in cloud mode with zookeeper-3.4.8. Thanks, John
