enable test_parallel_executor_fetch_isolated_var (#28219)

* enable test_parallel_executor_fetch_isolated_var, test=develop

* add enable_static, test=develop

* set test_parallel_executor_fetch_isolated_var RUN_TYPE=DIST, develop=test

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -339,7 +339,6 @@ list(REMOVE_ITEM TEST_OPS test_conv3d_transpose_op)
 # disable this unittest temporarily
 list(REMOVE_ITEM TEST_OPS test_imperative_data_loader_exception)
 list(REMOVE_ITEM TEST_OPS test_sampling_id_op)
-list(REMOVE_ITEM TEST_OPS test_parallel_executor_fetch_isolated_var)
 
 if (APPLE OR WIN32)
   list(REMOVE_ITEM TEST_OPS test_dataset)
@@ -587,6 +586,7 @@ set_tests_properties(test_parallel_executor_crf test_sync_batch_norm_op test_inp
         test_parallel_executor_seresnext_with_reduce_gpu
         test_parallel_executor_seresnext_with_fuse_all_reduce_gpu
         test_parallel_executor_profiler
+        test_parallel_executor_fetch_isolated_var
         PROPERTIES LABELS "RUN_TYPE=DIST")
 
 if(NOT WIN32 AND NOT APPLE)

python/paddle/fluid/tests/unittests/test_parallel_executor_fetch_isolated_var.py

@@ -16,6 +16,7 @@ import unittest
 import numpy as np
 import six
 import paddle.fluid as fluid
+import paddle
 
 
 def enable_parallel_ssa_executor(enabled=True):
@@ -57,6 +58,7 @@ class TestParallelExecutorFetchIsolatedVarBase(unittest.TestCase):
 
     def run_impl(self, use_gpu, dev_cnt, is_training, use_experimental_executor,
                  use_parallel_ssa_executor):
+        paddle.enable_static()
         enable_parallel_ssa_executor(use_parallel_ssa_executor)
 
         if fluid.is_compiled_with_cuda():