Hi Shalin, thank you very much for your answer. I found out and managed in recreating the problem.
I created a new collection, with the wrong configset. I got the error and the collection was not created, good. But after that I continue to see the "SolrCore Initialization Failures" in the Solr Admin web interface on all three nodes. I had to restart Solr to remove that error. >From this point if I try to change the configset and recreate the same collection I still continue to get the same previous error. So I discovered that the configuration is still in Zookeeper: root@index1:~# /usr/share/zookeeper/bin/zkCli.sh Connecting to localhost:2181 Welcome to ZooKeeper! JLine support is enabled WATCHER:: WatchedEvent state:SyncConnected type:None path:null [zk: localhost:2181(CONNECTED) 0] ls /solr/configs [test, test2] Even if the "test2" collection was not created due to the previous error. I had to remove (rmr) the configuration in Zookeeper to be able to recreate the collection. I think this is a bug, isn't it? The configuration should be removed from Zookeeper if the collection was not created due to an error...
