Solr4.7.2+tomcat+zookeeper Deployment Solrcloud Delete Collection

Solr+tomcat+zookeeper deploy Solrcloud. There were 1 machine systems in the cluster that were broken and the system was re-installed, and the collection shard file on the machine was missing. This machine reinstall the operating system after the re-deployment of SOLR, but the original collection shard is incomplete, decided to delete all shards, re-create collection, and then manually deleted the collection shard files on each machine, restart SOLR, The collection will still appear, resulting in the inability to create collection with the same name.

Workaround:

1, delete the/solr/collections/collectionname node on the zookeeper and all the child nodes;

2, delete the/solr/clusterstate.json node on the zookeeper;

3, restart SOLR, the original CollectionName clean.