disable ut test_parallel_executor_fetch_isolated_var,test=document_fix

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

@@ -235,6 +235,7 @@ 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_parallel_executor_fetch_isolated_var)
 if (APPLE OR WIN32)
   list(REMOVE_ITEM TEST_OPS test_dataset)
   list(REMOVE_ITEM TEST_OPS test_dataset_dataloader)
@@ -405,11 +406,12 @@ set_tests_properties(test_parallel_executor_test_while_train test_parallel_execu
         test_data_norm_op test_imperative_using_non_zero_gpu test_fuse_bn_act_pass
         test_optimizer_in_control_flow test_dataloader_keep_order
         test_dataloader_unkeep_order
-        test_parallel_executor_fetch_isolated_var
         test_parallel_executor_inference_feed_partial_data
         test_parallel_ssa_graph_inference_feed_partial_data
         test_fetch_unmerged
         test_buffer_shared_memory_reuse_pass PROPERTIES LABELS "RUN_TYPE=DIST")
+# disbale test_parallel_executor_fetch_isolated_var
+# set_tests_properties(test_parallel_executor_fetch_isolated_var PROPERTIES LABELS "RUN_TYPE=DIST")
 
 set_tests_properties(test_parallel_executor_crf test_sync_batch_norm_op test_inplace_abn_op
         test_parallel_executor_seresnext_base_gpu