fix paddle cloud role maker bug (#18269) (#18311)

* fix paddle cloud role maker bug

Author: seiriosPlus

python/paddle/fluid/incubate/fleet/base/role_maker.py

@@ -19,6 +19,8 @@
     'UserDefinedCollectiveRoleMaker', 'PaddleCloudRoleMaker'
 ]
 
+import os
+
 
 class Role:
     WORKER = 1
@@ -295,45 +297,62 @@ def generate_role(self):
 class PaddleCloudRoleMaker(RoleMakerBase):
     def __init__(self):
         super(PaddleCloudRoleMaker, self).__init__()
+        self._role_is_generated = False
 
     def generate_role(self):
         if not self._role_is_generated:
             self.port = os.getenv("PADDLE_PORT", "6174")
             self.pserver_ips = os.getenv("PADDLE_PSERVERS", "")
             eplist = []
-            for ip in pserver_ips.split(","):
-                eplist.append(':'.join([ip, port]))
-                self.endpoints = ",".join(eplist)
-                self.trainers = int(os.getenv("PADDLE_TRAINERS_NUM", "1"))
-                self.current_endpoint = os.getenv("POD_IP",
-                                                  "localhost") + ":" + port
-                self.role = os.getenv("TRAINING_ROLE", "TRAINER")
-                self.trainer_id = int(os.getenv("PADDLE_TRAINER_ID", "0"))
+            for ip in self.pserver_ips.split(","):
+                eplist.append(':'.join([ip, self.port]))
+            self.endpoints = ",".join(eplist)
+            self._trainers = int(os.getenv("PADDLE_TRAINERS_NUM", "1"))
+            self.current_endpoint = os.getenv("POD_IP",
+                                              "localhost") + ":" + self.port
+            self.role = os.getenv("TRAINING_ROLE", "TRAINER")
+            self.trainer_id = int(os.getenv("PADDLE_TRAINER_ID", "0"))
             self.eplist = eplist
+            print("PaddleCloudRoleMaker() endpoints: %s" % self.endpoints)
             self.endpoints = self.endpoints.split(",")
+            self._server_endpoints = self.endpoints
             if self.role.upper() == "PSERVER":
-                self.current_id = self.endpoints.index(self.current_endpoint)
+                self._current_id = self.endpoints.index(self.current_endpoint)
+                self._role = Role.SERVER
             else:
-                self.current_id = self.trainer_id
+                self._current_id = self.trainer_id
+                self._role = Role.WORKER
             self._role_is_generated = True
 
-    def is_wokrer(self):
+    def is_worker(self):
+        if not self._role_is_generated:
+            self.generate_role()
         return self._role == Role.WORKER
 
     def is_server(self):
+        if not self._role_is_generated:
+            self.generate_role()
         return self._role == Role.SERVER
 
     def is_first_worker(self):
+        if not self._role_is_generated:
+            self.generate_role()
         return self._role == Role.WORKER and self._current_id == 0
 
     def worker_index(self):
+        if not self._role_is_generated:
+            self.generate_role()
         return self._current_id
 
     def server_index(self):
+        if not self._role_is_generated:
+            self.generate_role()
         return self._current_id
 
     def worker_num(self):
-        return self._worker_num
+        if not self._role_is_generated:
+            self.generate_role()
+        return self._trainers
 
 
 class UserDefinedRoleMaker(RoleMakerBase):