pkuwm commented on a change in pull request #1190:
URL: https://github.com/apache/helix/pull/1190#discussion_r463477490



##########
File path: 
helix-rest/src/main/java/org/apache/helix/rest/server/resources/zookeeper/ZooKeeperAccessor.java
##########
@@ -52,12 +51,15 @@
   private static final Logger LOG = 
LoggerFactory.getLogger(ZooKeeperAccessor.class.getName());
   private BaseDataAccessor<byte[]> _zkBaseDataAccessor;
 
+  private static final String PATH_STR = "path";
+
   public enum ZooKeeperCommand {
     exists,
     getBinaryData,
     getStringData,
     getChildren,
-    getStat
+    getStat,
+    delete

Review comment:
       My opinion is, 
   1. use `DELETE` verb that is designed for the REST delete operation.
   2. if we only want to support deleting ephemeral, document it well and 
return a clear response like:
   ```
       HTTP/1.1  404
       Content-Type: application/json
    
       {
         "message": "Deleting a non-ephemeral node is not supported/allowed",
         "path": "/a/b/c"
       }
   ```
   And it is extensible if we want to support deleting persistent node in the 
future.




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