diff --git a/parl/remote/job.py b/parl/remote/job.py
index aa677ebfb9e18842f60491e24929e626fe2730a6..8e8587afe9c228eecc1f9f20aed59ad3b060eb09 100644
--- a/parl/remote/job.py
+++ b/parl/remote/job.py
@@ -16,8 +16,8 @@
 import compatible_trick
 
 import os
-os.environ['CUDA_VISIBLE_DEVICES'] = ''
 os.environ['XPARL'] = 'True'
+os.environ['CUDA_VISIBLE_DEVICES'] = ''
 import argparse
 import cloudpickle
 import pickle
@@ -66,21 +66,19 @@ class Job(object):
         self.log_server_address = log_server_address
         self.job_ip = get_ip_address()
         self.pid = os.getpid()
-
-        self.run_job_process = Process(
-            target=self.run, args=(job_address_sender, job_id_sender))
-        self.run_job_process.start()
         """
         NOTE:
             In Windows, it will raise errors when creating threading.Lock before starting multiprocess.Process.
         """
         self.lock = threading.Lock()
-        self._create_sockets()
+        th = threading.Thread(target=self._create_sockets)
+        th.setDaemon(True)
+        th.start()
 
         process = psutil.Process(self.pid)
         self.init_memory = float(process.memory_info()[0]) / (1024**2)
 
-        self.run_job_process.join()
+        self.run(job_address_sender, job_id_sender)
 
         with self.lock:
             self.kill_job_socket.send_multipart(
diff --git a/parl/remote/tests/cluster_test.py b/parl/remote/tests/cluster_test.py
index 8eab666747fcb5b4ebf2e570ae4233fd42e429f2..e00351b8b6141f053db4b14a220e01cc50508d83 100644
--- a/parl/remote/tests/cluster_test.py
+++ b/parl/remote/tests/cluster_test.py
@@ -13,7 +13,6 @@
 # limitations under the License.
 
 import unittest
-
 import parl
 from parl.remote.master import Master
 from parl.remote.worker import Worker
diff --git a/parl/remote/tests/paddle_gpu_test.py b/parl/remote/tests/paddle_gpu_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..d2d433ab089d93653a152c1a22350922636b7df1
--- /dev/null
+++ b/parl/remote/tests/paddle_gpu_test.py
@@ -0,0 +1,65 @@
+#   Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+
+import unittest
+import parl
+from parl.remote.master import Master
+from parl.remote.worker import Worker
+import time
+import threading
+from parl.remote.client import disconnect
+from parl.remote import exceptions
+import subprocess
+from parl.utils import logger
+import paddle.fluid as fluid
+import os
+
+
+@parl.remote_class
+class Actor(object):
+    def __init__(self, cuda=False):
+        if cuda:
+            place = fluid.CUDAPlace(0)
+        else:
+            place = fluid.CPUPlace()
+        exe = fluid.Executor(place)
+        exe.run(fluid.default_startup_program())
+
+
+class TestCluster(unittest.TestCase):
+    def tearDown(self):
+        disconnect()
+
+    def test_gpu(self):
+        master = Master(port=8241)
+        th = threading.Thread(target=master.run)
+        th.start()
+        time.sleep(1)
+
+        worker1 = Worker('localhost:8241', 4)
+
+        parl.connect('localhost:8241')
+
+        if parl.utils.is_gpu_available():
+            actor = Actor(cuda=True)
+        else:
+            actor = Actor(cuda=False)
+
+        del actor
+        master.exit()
+        worker1.exit()
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/parl/remote/utils.py b/parl/remote/utils.py
index 5d6368e21d2f9d19a72f28eea0d214df8a913664..221de528a32bd035f0f5aa92f9de93e45c1e04a8 100644
--- a/parl/remote/utils.py
+++ b/parl/remote/utils.py
@@ -114,7 +114,7 @@ def locate_remote_file(module_path):
         module_path: Absolute path of the module.
 
     Example:
-        module_path: /home/user/dir/subdir/my_module
+        module_path: /home/user/dir/subdir/my_module (or) ./dir/main
         entry_file: /home/user/dir/main.py
         --------> relative_path: subdir/my_module
   """
@@ -129,6 +129,9 @@ def locate_remote_file(module_path):
             if os.path.isfile(to_check_path):
                 entry_path = path
                 break
+    # transfer the relative path to the absolute path
+    if not os.path.isabs(module_path):
+        module_path = os.path.abspath(module_path)
     if entry_path is None or \
         (module_path.startswith(os.sep) and entry_path != module_path[:len(entry_path)]):
         raise FileNotFoundError("cannot locate the remote file")