diff --git a/pyzoo/dev/run-pytests-ray b/pyzoo/dev/run-pytests-ray
index 16344974efc..b995e2b2fea 100644
--- a/pyzoo/dev/run-pytests-ray
+++ b/pyzoo/dev/run-pytests-ray
@@ -24,7 +24,8 @@ export PYSPARK_PYTHON=python
 export PYSPARK_DRIVER_PYTHON=python
 
 python -m pytest -v ../test/zoo/ray/ \
-       --ignore=../test/zoo/ray/integration/
+       --ignore=../test/zoo/ray/integration/ \
+       --ignore=../test/zoo/ray/test_reinit_raycontext.py
 exit_status_2=$?
 if [ $exit_status_2 -ne 0 ];
 then
diff --git a/pyzoo/test/zoo/ray/integration/test_yarn_reinit_raycontext.py b/pyzoo/test/zoo/ray/integration/test_yarn_reinit_raycontext.py
new file mode 100644
index 00000000000..6c38bf8e52f
--- /dev/null
+++ b/pyzoo/test/zoo/ray/integration/test_yarn_reinit_raycontext.py
@@ -0,0 +1,60 @@
+#
+# Copyright 2018 Analytics Zoo Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from unittest import TestCase
+
+import numpy as np
+import psutil
+import pytest
+import ray
+import time
+
+from zoo import init_spark_on_yarn
+from zoo.ray.util.raycontext import RayContext
+
+np.random.seed(1337)  # for reproducibility
+
+
+@ray.remote
+class TestRay():
+    def hostname(self):
+        import socket
+        return socket.gethostname()
+
+
+node_num = 4
+sc = init_spark_on_yarn(
+    hadoop_conf="/opt/work/hadoop-2.7.2/etc/hadoop/",
+    conda_name="rayexample",
+    num_executor=node_num,
+    executor_cores=28,
+    executor_memory="10g",
+    driver_memory="2g",
+    driver_cores=4,
+    extra_executor_memory_for_ray="30g")
+ray_ctx = RayContext(sc=sc, object_store_memory="2g")
+ray_ctx.init()
+actors = [TestRay.remote() for i in range(0, node_num)]
+print([ray.get(actor.hostname.remote()) for actor in actors])
+ray_ctx.stop()
+# repeat
+ray_ctx = RayContext(sc=sc, object_store_memory="1g")
+ray_ctx.init()
+actors = [TestRay.remote() for i in range(0, node_num)]
+print([ray.get(actor.hostname.remote()) for actor in actors])
+ray_ctx.stop()
+
+sc.stop()
+time.sleep(3)
diff --git a/pyzoo/test/zoo/ray/test_ray_on_local.py b/pyzoo/test/zoo/ray/test_ray_on_local.py
index 61dc3703d23..461b1203637 100644
--- a/pyzoo/test/zoo/ray/test_ray_on_local.py
+++ b/pyzoo/test/zoo/ray/test_ray_on_local.py
@@ -50,5 +50,6 @@ def test_local(self):
             for pid in process_info.pids:
                 assert not psutil.pid_exists(pid)
 
+
 if __name__ == "__main__":
     pytest.main([__file__])
diff --git a/pyzoo/test/zoo/ray/test_reinit_raycontext.py b/pyzoo/test/zoo/ray/test_reinit_raycontext.py
new file mode 100644
index 00000000000..514955cbf48
--- /dev/null
+++ b/pyzoo/test/zoo/ray/test_reinit_raycontext.py
@@ -0,0 +1,62 @@
+#
+# Copyright 2018 Analytics Zoo Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from unittest import TestCase
+
+import numpy as np
+import psutil
+import pytest
+import ray
+import time
+
+from zoo import init_spark_on_local
+from zoo.ray.util.raycontext import RayContext
+
+np.random.seed(1337)  # for reproducibility
+
+
+@ray.remote
+class TestRay():
+    def hostname(self):
+        import socket
+        return socket.gethostname()
+
+
+class TestUtil(TestCase):
+
+        def test_local(self):
+            node_num = 4
+            sc = init_spark_on_local(cores=node_num)
+            ray_ctx = RayContext(sc=sc, object_store_memory="1g")
+            ray_ctx.init()
+            actors = [TestRay.remote() for i in range(0, node_num)]
+            print([ray.get(actor.hostname.remote()) for actor in actors])
+            ray_ctx.stop()
+            time.sleep(3)
+            # repeat
+            print("-------------------first repeat begin!------------------")
+            ray_ctx = RayContext(sc=sc, object_store_memory="1g")
+            ray_ctx.init()
+            actors = [TestRay.remote() for i in range(0, node_num)]
+            print([ray.get(actor.hostname.remote()) for actor in actors])
+            ray_ctx.stop()
+            sc.stop()
+            time.sleep(3)
+            for process_info in ray_ctx.ray_processesMonitor.process_infos:
+                for pid in process_info.pids:
+                    assert not psutil.pid_exists(pid)
+
+if __name__ == "__main__":
+    pytest.main([__file__])
diff --git a/pyzoo/zoo/ray/util/__init__.py b/pyzoo/zoo/ray/util/__init__.py
index f6792adaef8..0f0a3e748e1 100755
--- a/pyzoo/zoo/ray/util/__init__.py
+++ b/pyzoo/zoo/ray/util/__init__.py
@@ -31,7 +31,7 @@ def _shutdown_per_node(iter):
             effect_pgids = [pair[0] for pair in zip(pgids, node_ips) if pair[1] == current_node_ip]
         else:
             effect_pgids = pgids
-        for pgid in pgids:
+        for pgid in effect_pgids:
             print("Stopping by pgid {}".format(pgid))
             try:
                 os.killpg(pgid, signal.SIGTERM)
diff --git a/pyzoo/zoo/ray/util/process.py b/pyzoo/zoo/ray/util/process.py
index a911998e51a..9e1256c62d8 100644
--- a/pyzoo/zoo/ray/util/process.py
+++ b/pyzoo/zoo/ray/util/process.py
@@ -88,8 +88,9 @@ def session_execute(command, env=None, tag=None, fail_fast=False, timeout=120):
 
 
 class ProcessMonitor:
-    def __init__(self, process_infos, sc, ray_rdd, verbose=False):
+    def __init__(self, process_infos, sc, ray_rdd, raycontext, verbose=False):
         self.sc = sc
+        self.raycontext = raycontext
         self.verbose = verbose
         self.ray_rdd = ray_rdd
         self.master = []
@@ -123,9 +124,13 @@ def print_ray_remote_err_out(self):
                 print(slave)
 
     def clean_fn(self):
+        if self.raycontext.stopped:
+            return
         import ray
         ray.shutdown()
-        if not is_local(self.sc):
+        if not self.sc:
+            print("WARNING: SparkContext has been stopped before cleaning the Ray resources")
+        if self.sc and (not is_local(self.sc)):
             self.ray_rdd.map(gen_shutdown_per_node(self.pgids, self.node_ips)).collect()
         else:
             gen_shutdown_per_node(self.pgids, self.node_ips)([])
diff --git a/pyzoo/zoo/ray/util/raycontext.py b/pyzoo/zoo/ray/util/raycontext.py
index 18034fd09c5..10a296a1c27 100755
--- a/pyzoo/zoo/ray/util/raycontext.py
+++ b/pyzoo/zoo/ray/util/raycontext.py
@@ -356,7 +356,7 @@ def init(self, object_store_memory=None,
         :param extra_params: key value dictionary for extra options to launch Ray.
                              i.e extra_params={"temp-dir": "/tmp/ray2/"}
         """
-
+        self.stopped = False
         self._start_cluster()
         if object_store_memory is None:
             object_store_memory = self._get_ray_plasma_memory_local()
@@ -372,7 +372,7 @@ def _start_cluster(self):
         process_infos = ray_rdd.barrier().mapPartitions(
             self.ray_service.gen_ray_start()).collect()
 
-        self.ray_processesMonitor = ProcessMonitor(process_infos, self.sc, ray_rdd,
+        self.ray_processesMonitor = ProcessMonitor(process_infos, self.sc, ray_rdd, self,
                                                    verbose=self.verbose)
         self.redis_address = self.ray_processesMonitor.master.master_addr
         return self