https://issues.apache.org/jira/browse/SOLR-7982
We have a 3 Zookeeper 5 solr server Solrcloud. We created collection1 and collection2 with 80 shards respectively in the cloud, replicateFactor is 2. But after created, we found in a same collection, the coreNodeName has some duplicate in core.properties in the core folder. For example: [tanglin@solr64 home]$ ll collection1_shard13_replica2/core.properties rw-rr- 1 solr solr 173 Jul 29 11:52 collection1_shard13_replica2/core.properties [tanglin@solr64 home]$ ll collection1_shard66_replica1/core.properties rw-rr- 1 solr solr 173 Jul 29 11:52 collection1_shard66_replica1/core.properties [tanglin@solr64 home]$ cat collection1_shard66_replica1/core.properties #Written by CorePropertiesLocator #Wed Jul 29 11:52:54 UTC 2015 numShards=80 name=collection1_shard66_replica1 shard=shard66 collection=collection1 coreNodeName=core_node19 [tanglin@solr64 home]$ cat collection1_shard13_replica2/core.properties #Written by CorePropertiesLocator #Wed Jul 29 11:52:53 UTC 2015 numShards=80 name=collection1_shard13_replica2 shard=shard13 collection=collection1 coreNodeName=core_node19 [tanglin@solr64 home]$ The consequence of the issue is that the clusterstate.json in zookeeper is also with wrong core_node#, and updating state of a core sometimes changed the state of other core in other shard.. Snippet from clusterstate: "shard13":{ "range":"a6660000-a998ffff", "state":"active", "replicas":{ "core_node33": { "state":"active", "base_url":"https://solr65.somesite.com:8443/solr", "core":"collection1_shard13_replica1", "node_name":"solr65.somesite.com:8443_solr"} , "core_node19": { "state":"active", "base_url":"https://solr64.somesite.com:8443/solr", "core":"collection1_shard13_replica2", "node_name":"solr64.somesite.com:8443_solr", "leader":"true"} }}, ... "shard66":{ "range":"50000000-5332ffff", "state":"active", "replicas":{ "core_node105": { "state":"active", "base_url":"https://solr63.somesite.com:8443/solr", "core":"collection1_shard66_replica2", "node_name":"solr63.somesite.com:8443_solr", "leader":"true"} , "core_node19": { "state":"active", "base_url":"https://solr64.somesite.com:8443/solr", "core":"collection1_shard66_replica1", "node_name":"solr64.somesite.com:8443_solr"} }}, -- View this message in context: http://lucene.472066.n3.nabble.com/SolrCloud-collection-creation-There-are-duplicate-coreNodeName-in-core-properties-in-a-same-collecti-tp4225532.html Sent from the Solr - User mailing list archive at Nabble.com.