diff --git a/python/orca/src/bigdl/orca/ray/raycontext.py b/python/orca/src/bigdl/orca/ray/raycontext.py
index 401080634d7..ac8f4f5a4e9 100755
--- a/python/orca/src/bigdl/orca/ray/raycontext.py
+++ b/python/orca/src/bigdl/orca/ray/raycontext.py
@@ -24,6 +24,7 @@
 import tempfile
 import filelock
 import multiprocessing
+from packaging import version
 
 from zoo.ray.process import session_execute, ProcessMonitor
 from zoo.ray.utils import is_local
@@ -527,12 +528,17 @@ def init(self, driver_cores=0):
                     for k, v in self.extra_params.items():
                         kw = k.replace("-", "_")
                         kwargs[kw] = v
-                self._address_info = ray.init(num_cpus=self.ray_node_cpu_cores,
-                                              _redis_password=self.redis_password,
-                                              object_store_memory=self.object_store_memory,
-                                              include_dashboard=self.include_webui,
-                                              dashboard_host="0.0.0.0",
-                                              *kwargs)
+                init_params = dict(
+                    num_cpus=self.ray_node_cpu_cores,
+                    _redis_password=self.redis_password,
+                    object_store_memory=self.object_store_memory,
+                    include_dashboard=self.include_webui,
+                    dashboard_host="0.0.0.0",
+                )
+                init_params.update(kwargs)
+                if version.parse(ray.__version__) >= version.parse("1.4.0"):
+                    init_params["namespace"] = "az"
+                self._address_info = ray.init(**init_params)
             else:
                 self.cluster_ips = self._gather_cluster_ips()
                 from bigdl.util.common import init_executor_gateway
@@ -614,6 +620,12 @@ def _start_driver(self, num_cores, redis_address):
                                       node_ip_address=node_ip,
                                       redis_address=redis_address)
         ray.shutdown()
-        return ray.init(address=redis_address,
-                        _redis_password=self.ray_service.password,
-                        _node_ip_address=node_ip)
+        init_params = dict(
+            address=redis_address,
+            namespace="az",
+            _redis_password=self.ray_service.password,
+            _node_ip_address=node_ip
+        )
+        if version.parse(ray.__version__) >= version.parse("1.4.0"):
+            init_params["namespace"] = "az"
+        return ray.init(**init_params)