I’m helping someone with this but my zookeeper experience is limited (as in none). They have purportedly followed the instruction from the wiki.
https://cwiki.apache.org/confluence/display/solr/Setting+Up+an+External+ZooKeeper+Ensemble Jun 02, 2015 2:40:37 PM org.apache.solr.common.cloud.ZkStateReader updateClusterState INFO: Updating cloud state from ZooKeeper... Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.ZkController createCollectionZkNode INFO: Check for collection zkNode:client_active Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.Overseer$ClusterStateUpdater updateState INFO: Update state numShards=null message={ "operation":"state", "state":"down", "base_url":"http://10.10.1.178:8983/solr", "core":"client_active", "roles":null, "node_name":"10.10.1.178:8983_solr", "shard":null, "collection":"client_active", "numShards":null, "core_node_name":"10.10.1.178:8983_solr_client_active"} Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.ZkController createCollectionZkNode INFO: Creating collection in ZooKeeper:client_active Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.Overseer$ClusterStateUpdater updateState INFO: shard=shard1 is already registered Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.ZkController getConfName INFO: Looking for collection configName Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.ZkController getConfName INFO: Could not find collection configName - pausing for 3 seconds and trying again - try: 1 Jun 02, 2015 2:40:37 PM org.apache.solr.cloud.DistributedQueue$LatchChildWatcher process INFO: LatchChildWatcher fired on path: /overseer/queue state: SyncConnected type NodeChildrenChanged Jun 02, 2015 2:40:37 PM org.apache.solr.common.cloud.ZkStateReader$2 process INFO: A cluster state change: WatchedEvent state:SyncConnected type:NodeDataChanged path:/clusterstate.json, has occurred - updating... (live nodes size: 1) Jun 02, 2015 2:40:40 PM org.apache.solr.cloud.ZkController getConfName INFO: Could not find collection configName - pausing for 3 seconds and trying again - try: 2 Jun 02, 2015 2:40:43 PM org.apache.solr.cloud.ZkController getConfName INFO: Could not find collection configName - pausing for 3 seconds and trying again - try: 3 Jun 02, 2015 2:40:46 PM org.apache.solr.cloud.ZkController getConfName INFO: Could not find collection configName - pausing for 3 seconds and trying again - try: 4 Jun 02, 2015 2:40:49 PM org.apache.solr.cloud.ZkController getConfName INFO: Could not find collection configName - pausing for 3 seconds and trying again - try: 5 Jun 02, 2015 2:40:52 PM org.apache.solr.cloud.ZkController getConfName SEVERE: Could not find configName for collection client_active Jun 02, 2015 2:40:52 PM org.apache.solr.core.CoreContainer recordAndThrow SEVERE: Unable to create core: client_active org.apache.solr.common.cloud.ZooKeeperException: Could not find configName for collection client_active found:null -- -------------- *Mi aerodeslizador está lleno de anguilas.*