update doc and dist test due to API change #7619 (review)

Author: putcn

doc/howto/usage/cluster/fluid_cluster_train_en.md

@@ -101,9 +101,11 @@ t.transpile(optimize_ops, params_grads, pservers=pserver_endpoints, trainers=2)
 ... #create executor
 
 # in pserver, run this
-exe.run(fluid.default_startup_program())
 #current_endpoint here means current pserver IP:PORT you wish to run on
-exe.run(t.get_pserver_program(current_endpoint))
+pserver_prog = t.get_pserver_program(current_endpoint)
+pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+exe.run(pserver_startup)
+exe.run(pserver_prog)
 
 # in trainer, run this
 ... # define data reader

python/paddle/v2/fluid/tests/book_distribute/notest_dist_fit_a_line.py

@@ -54,7 +54,8 @@
         print("need env SERVER_ENDPOINT")
         exit(1)
     pserver_prog = t.get_pserver_program(current_endpoint)
-    exe.run(fluid.default_startup_program())
+    pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+    exe.run(pserver_startup)
     exe.run(pserver_prog)
 else:
     trainer_prog = t.get_trainer_program()

python/paddle/v2/fluid/tests/book_distribute/notest_dist_label_semantic_roles.py

@@ -198,7 +198,8 @@ def main():
             print("need env SERVER_ENDPOINT")
             exit(1)
         pserver_prog = t.get_pserver_program(current_endpoint)
-        exe.run(fluid.default_startup_program())
+        pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+        exe.run(pserver_startup)
         exe.run(pserver_prog)
     elif training_role == "TRAINER":
         trainer_prog = t.get_trainer_program()

python/paddle/v2/fluid/tests/book_distribute/notest_dist_word2vec.py

@@ -88,7 +88,8 @@
         print("need env SERVER_ENDPOINT")
         exit(1)
     pserver_prog = t.get_pserver_program(current_endpoint)
-    exe.run(fluid.default_startup_program())
+    pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+    exe.run(pserver_startup)
     exe.run(pserver_prog)
 elif training_role == "TRAINER":
     feeder = fluid.DataFeeder(

python/paddle/v2/fluid/tests/book_distribute/notest_recognize_digits_conv_dist.py

@@ -67,7 +67,8 @@
         print("need env SERVER_ENDPOINT")
         exit(1)
     pserver_prog = t.get_pserver_program(current_endpoint)
-    exe.run(fluid.default_startup_program())
+    pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+    exe.run(pserver_startup)
     exe.run(pserver_prog)
 elif training_role == "TRAINER":
     trainer_prog = t.get_trainer_program()

python/paddle/v2/fluid/tests/book_distribute/notest_recognize_digits_mlp_dist.py

@@ -61,7 +61,8 @@
         print("need env SERVER_ENDPOINT")
         exit(1)
     pserver_prog = t.get_pserver_program(current_endpoint)
-    exe.run(fluid.default_startup_program())
+    pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+    exe.run(pserver_startup)
     exe.run(pserver_prog)
 elif training_role == "TRAINER":
     trainer_prog = t.get_trainer_program()

python/paddle/v2/fluid/tests/book_distribute/notest_understand_sentiment_conv_dist.py

@@ -92,15 +92,16 @@ def main():
     t.transpile(
         optimize_ops, params_grads, pservers=pserver_endpoints, trainers=2)
 
-    exe.run(fluid.default_startup_program())
-
     if training_role == "PSERVER":
         if not current_endpoint:
             print("need env SERVER_ENDPOINT")
             exit(1)
         pserver_prog = t.get_pserver_program(current_endpoint)
+        pserver_startup = t.get_startup_program(current_endpoint, pserver_prog)
+        exe.run(pserver_startup)
         exe.run(pserver_prog)
     elif training_role == "TRAINER":
+        exe.run(fluid.default_startup_program())
         trainer_prog = t.get_trainer_program()
         feeder = fluid.DataFeeder(feed_list=[data, label], place=place)