fix the bug of recursive creating actors

parl/remote/job.py

@@ -36,6 +36,7 @@ from parl.utils.communication import loads_argument, loads_return,\
 from parl.remote import remote_constants
 from parl.utils.exceptions import SerializeError, DeserializeError
 from parl.remote.message import InitializedJob
+from parl.remote.utils import load_remote_class
 
 
 class Job(object):
@@ -301,12 +302,12 @@ class Job(object):
 
         if tag == remote_constants.INIT_OBJECT_TAG:
             try:
-                file_name, class_name = cloudpickle.loads(message[1])
+                file_name, class_name, end_of_file = cloudpickle.loads(
+                    message[1])
                 #/home/nlp-ol/Firework/baidu/nlp/evokit/python_api/es_agent -> es_agent
                 file_name = file_name.split(os.sep)[-1]
+                cls = load_remote_class(file_name, class_name, end_of_file)
                 args, kwargs = cloudpickle.loads(message[2])
-                mod = __import__(file_name)
-                cls = getattr(mod, class_name)._original
                 obj = cls(*args, **kwargs)
             except Exception as e:
                 traceback_str = str(traceback.format_exc())

parl/remote/remote_decorator.py

@@ -75,6 +75,12 @@ def remote_class(*args, **kwargs):
     """
 
     def decorator(cls):
+        # we are not going to create a remote actor in job.py
+        if 'XPARL' in os.environ and os.environ['XPARL'] == 'True':
+            logger.warning(
+                "Note: this object will be runnning as a local object")
+            return cls
+
         class RemoteWrapper(object):
             """
             Wrapper for remote class in client side.
@@ -115,10 +121,12 @@ def remote_class(*args, **kwargs):
 
                 self.send_file(self.job_socket)
                 file_name = inspect.getfile(cls)[:-3]
+                cls_source = inspect.getsourcelines(cls)
+                end_of_file = cls_source[1] + len(cls_source[0])
                 class_name = cls.__name__
                 self.job_socket.send_multipart([
                     remote_constants.INIT_OBJECT_TAG,
-                    cloudpickle.dumps([file_name, class_name]),
+                    cloudpickle.dumps([file_name, class_name, end_of_file]),
                     cloudpickle.dumps([args, kwargs]),
                 ])
                 message = self.job_socket.recv_multipart()
@@ -130,7 +138,10 @@ def remote_class(*args, **kwargs):
 
             def __del__(self):
                 """Delete the remote class object and release remote resources."""
-                self.job_socket.setsockopt(zmq.RCVTIMEO, 1 * 1000)
+                try:
+                    self.job_socket.setsockopt(zmq.RCVTIMEO, 1 * 1000)
+                except AttributeError:
+                    pass
                 if not self.job_shutdown:
                     try:
                         self.job_socket.send_multipart(

parl/remote/tests/local_actor.py

+#   Copyright (c) 2020 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 os
+os.environ['XPARL'] = 'True'
+import parl
+import unittest
+
+
+@parl.remote_class(max_memory=350)
+class Actor(object):
+    def __init__(self, x=10):
+        self.x = x
+        self.data = []
+
+    def add_500mb(self):
+        self.data.append(os.urandom(500 * 1024**2))
+        self.x += 1
+        return self.x
+
+
+class TestLocalActor(unittest.TestCase):
+    def test_create_actors_without_pre_connection(self):
+        actor = Actor()
+
+
+if __name__ == '__main__':
+    unittest.main()

parl/remote/tests/recursive_actor.py

+#   Copyright (c) 2020 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
+from parl.utils import logger
+import parl
+from parl.remote.client import disconnect
+from parl.remote.master import Master
+from parl.remote.worker import Worker
+import time
+import threading
+
+c = 10
+port = 3002
+master = Master(port=port)
+th = threading.Thread(target=master.run)
+th.setDaemon(True)
+th.start()
+time.sleep(5)
+cluster_addr = 'localhost:{}'.format(port)
+parl.connect(cluster_addr)
+worker = Worker(cluster_addr, 1)
+
+
+@parl.remote_class
+class Actor(object):
+    def add(self, a, b):
+        return a + b + c
+
+
+actor = Actor()
+
+
+class TestRecursive_actor(unittest.TestCase):
+    def tearDown(self):
+        disconnect()
+
+    def test_global_running(self):
+        self.assertEqual(actor.add(1, 2), 13)
+        master.exit()
+        worker.exit()
+
+
+if __name__ == '__main__':
+    unittest.main()

parl/remote/utils.py

+#   Copyright (c) 2020 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.
+
+__all__ = ['load_remote_class']
+
+
+def simplify_code(code, end_of_file):
+    """
+  @parl.remote_actor has to use this function to simplify the code.
+  To create a remote object, PARL has to import the module that contains the decorated class.
+  It may run some unnecessary code when importing the module, and this is why we use this function
+  to simplify the code.
+
+  For example.
+  @parl.remote_actor
+  class A(object):
+    def add(self, a, b):
+    return a + b
+  def data_process():
+    XXXX
+  ------------------>
+  line 25 and 26 will be removed.
+  """
+    to_write_lines = []
+    for i, line in enumerate(code):
+        if line.startswith('parl.connect'):
+            continue
+        if i < end_of_file - 1:
+            to_write_lines.append(line)
+        else:
+            break
+    return to_write_lines
+
+
+def load_remote_class(file_name, class_name, end_of_file):
+    with open(file_name) as t_file:
+        code = t_file.readlines()
+    code = simplify_code(code)
+    tmp_file_name = 'parl_' + file_name
+    with open(tmp_file_name, 'w') as t_file:
+        for line in code:
+            t_file.write(line)
+    mod = __import__(tmp_file_name)
+    cls = getattr(mod, class_name)._original
+    return cls