diff --git a/examples/aishell/asr1/conf/conformer.yaml b/examples/aishell/asr1/conf/conformer.yaml
index d5d883a03..a150a04d5 100644
--- a/examples/aishell/asr1/conf/conformer.yaml
+++ b/examples/aishell/asr1/conf/conformer.yaml
@@ -85,7 +85,7 @@ scheduler: warmuplr
 scheduler_conf:
   warmup_steps: 25000
   lr_decay: 1.0
-log_interval: 1
+log_interval: 100
 checkpoint:
   kbest_n: 50
   latest_n: 5
diff --git a/paddlespeech/s2t/exps/u2/model.py b/paddlespeech/s2t/exps/u2/model.py
index bcbc15d64..efcc9629f 100644
--- a/paddlespeech/s2t/exps/u2/model.py
+++ b/paddlespeech/s2t/exps/u2/model.py
@@ -239,7 +239,7 @@ class U2Trainer(Trainer):
                 n_iter_processes=config.num_workers,
                 subsampling_factor=1,
                 num_encs=1,
-                dist_sampler=True,
+                dist_sampler=config.get('dist_sampler', False),
                 shortest_first=False)
 
             self.valid_loader = BatchDataLoader(
@@ -260,7 +260,7 @@ class U2Trainer(Trainer):
                 n_iter_processes=config.num_workers,
                 subsampling_factor=1,
                 num_encs=1,
-                dist_sampler=True,
+                dist_sampler=config.get('dist_sampler', False),
                 shortest_first=False)
             logger.info("Setup train/valid Dataloader!")
         else:
diff --git a/paddlespeech/s2t/modules/initializer.py b/paddlespeech/s2t/modules/initializer.py
index 98466ebdb..30a04e44f 100644
--- a/paddlespeech/s2t/modules/initializer.py
+++ b/paddlespeech/s2t/modules/initializer.py
@@ -160,9 +160,12 @@ class DefaultInitializerContext(object):
         self.init_type = init_type
 
     def __enter__(self):
-        from paddlespeech.s2t.modules import align
-        align.global_init_type = self.init_type
-        return self
+        if self.init_type is None:
+            return
+        else:
+            from paddlespeech.s2t.modules import align
+            align.global_init_type = self.init_type
+            return
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         from paddlespeech.s2t.modules import align