dsmiley commented on a change in pull request #17:
URL: https://github.com/apache/solr/pull/17#discussion_r651237184



##########
File path: 
solr/core/src/java/org/apache/solr/cloud/api/collections/CreateCollectionCmd.java
##########
@@ -560,10 +559,16 @@ public static void 
createCollectionZkNode(DistribStateManager stateManager, Stri
           }
 
           collectionProps.remove(ZkStateReader.NUM_SHARDS_PROP);  // we don't 
put numShards in the collections properties
+          collectionProps.remove(ZkStateReader.CONFIGNAME_PROP); // we don't 
write configName on a zk collection node
 
-          ZkNodeProps zkProps = new ZkNodeProps(collectionProps);
-          stateManager.makePath(collectionPath, Utils.toJSON(zkProps), 
CreateMode.PERSISTENT, false);
-
+          if (collectionProps.size() > 0) {
+            ZkNodeProps zkProps = new ZkNodeProps(collectionProps);
+            // create a node with collectionProps data
+            stateManager.makePath(collectionPath, Utils.toJSON(zkProps), 
CreateMode.PERSISTENT, false);

Review comment:
       Try to create one: 
https://nightlies.apache.org/solr/draft-guides/solr-reference-guide-main/collection-management.html#create
  with `property.foo=bar` and see if foo=bar winds up in that JSON.  I think it 
will be there.




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