You're right, but nutch 1.6 comes along with solrj v3.4 which doesn't include CloudSolrServer. That's why we wrote such a patch. We already use CloudSolrServer for querying solr shards.
BTW: I changed the solrj version of nutch 1.6 to 4.3.1 but they're not working well together while indexing So do you prefer any other solution for partitioning and indexing from nutch 1.6 to solr cloud? Best.
