diff --git a/python/ray/node.py b/python/ray/node.py
index 885049815..5a7e9e00f 100644
--- a/python/ray/node.py
+++ b/python/ray/node.py
@@ -104,6 +104,7 @@ class Node:
                     head), "LRU Evict can only be passed into the head node."
 
         self._raylet_ip_address = raylet_ip_address
+
         self.metrics_agent_port = (ray_params.metrics_agent_port
                                    or self._get_unused_port()[0])
         self._metrics_export_port = ray_params.metrics_export_port
diff --git a/python/ray/worker.py b/python/ray/worker.py
index 7210d5a0a..4e96679ba 100644
--- a/python/ray/worker.py
+++ b/python/ray/worker.py
@@ -625,6 +625,11 @@ def init(
                 "please call ray.init() or ray.init(address=\"auto\") on the "
                 "driver.")
 
+    # Convert hostnames to numerical IP address.
+    if _node_ip_address is not None:
+        node_ip_address = services.address_to_ip(_node_ip_address)
+    raylet_ip_address = node_ip_address
+
     if address:
         redis_address, _, _ = services.validate_redis_address(address)
     else:
@@ -662,8 +667,8 @@ def init(
         # In this case, we need to start a new cluster.
         ray_params = ray.parameter.RayParams(
             redis_address=redis_address,
-            node_ip_address=None,
-            raylet_ip_address=None,
+            node_ip_address=node_ip_address,
+            raylet_ip_address=raylet_ip_address,
             object_ref_seed=None,
             driver_mode=driver_mode,
             redirect_worker_output=None,
@@ -727,8 +732,8 @@ def init(
 
         # In this case, we only need to connect the node.
         ray_params = ray.parameter.RayParams(
-            node_ip_address=None,
-            raylet_ip_address=None,
+            node_ip_address=node_ip_address,
+            raylet_ip_address=raylet_ip_address,
             redis_address=redis_address,
             redis_password=_redis_password,
             object_ref_seed=None,