From 3321e8c541b0a996fbf41f721dde0b1f35233a16 Mon Sep 17 00:00:00 2001
From: William Falcon <falc@fb.com>
Date: Thu, 18 Jul 2019 11:18:19 -0400
Subject: [PATCH] set dp as default backend

---
 pytorch_lightning/models/trainer.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pytorch_lightning/models/trainer.py b/pytorch_lightning/models/trainer.py
index 83ea5724..30896300 100644
--- a/pytorch_lightning/models/trainer.py
+++ b/pytorch_lightning/models/trainer.py
@@ -289,7 +289,7 @@ class Trainer(TrainerIO):
         self.test_dataloader = model.test_dataloader
         self.val_dataloader = model.val_dataloader
 
-        if self.data_parallel and not isinstance(self.tng_dataloader.sampler, DistributedSampler):
+        if self.use_ddp and not isinstance(self.tng_dataloader.sampler, DistributedSampler):
             msg = '''
             when using multiple gpus and multiple nodes you must pass a DistributedSampler to DataLoader(sampler).