Resolve reviewer comments

src/main/java/ir/sahab/zk/client/ZkClient.java

@@ -308,12 +308,12 @@ public String addSequentiallyNamedNode(String parentPath, String namePrefix, byt
      */
     public void addPersistentNode(String path, byte[] data, boolean createParent)
             throws ZkClientException, InterruptedException {
-        // There is a corner case where Curator throws a ConnectionLoss but actually we added
-        // the ZK node. In order to be sure that the logic used for the exceptional case is correct,
+        // There is a corner case where Curator throws a ConnectionLoss but the ZK node is actually added.
+        // In order to be sure that the logic used for the exceptional case is correct,
         // it is necessary to first check the existence of the path and if it exists, skip the rest
         // of the operations.
         if (exists(path)) {
-            throw new ZkClientException("Failed to add ZK node because node exists: path = " + path);
+            throw new ZkClientException("Failed to add ZK node because node exists: " + path);
         }
 
         try {
@@ -328,13 +328,13 @@ public void addPersistentNode(String path, byte[] data, boolean createParent)
         } catch (InterruptedException ex) {
             throw ex;
         } catch (Exception ex) {
-            // There is a corner case where Curator throws a ConnectionLoss but actually we added
-            // the ZK node, so when we retry we get NodeExists exception. In here, we check whether
-            // node created or not and ignore error if exists.
+            // There is a corner case where Curator throws a ConnectionLoss but the ZK node is actually
+            // added, so when we retry we get NodeExists exception. In here, we check whether the node
+            // is created or not and ignore the exception if the node exists.
             if (exists(path) && Arrays.equals(getData(path), data)) {
-                logger.warn("Retrieve error in creating ZK path but node created anyway: path = {}", path);
+                logger.warn("Retrieve error in creating ZK path but node created anyway: {}", path);
             } else {
-                throw new ZkClientException("Failed to add a persistent ZK node: path = {}" + path);
+                throw new ZkClientException("Failed to add a persistent ZK node: " + path, ex);
             }
         }
     }