fix gpu log typo (#43634)

python/paddle/distributed/launch/controllers/watcher.py

@@ -24,7 +24,7 @@ class Watcher(object):
     def __init__(self, ctx):
         self.ctx = ctx
 
-        self.interval = 10
+        self.interval = 30
 
         self.gpu_util = []
 
@@ -80,7 +80,7 @@ class Watcher(object):
 
             self.gpu_fd.flush()
         except:
-            self.ctx.log.error("save gpu info failed")
+            self.ctx.logger.warning("save gpu info failed")
 
     def _save_gpu_log(self, util_key):
         try:
@@ -89,7 +89,7 @@ class Watcher(object):
                 self.gpu_fd.write('\n')
             self.gpu_fd.flush()
         except:
-            self.ctx.log.error("save gpu log failed")
+            self.ctx.logger.warning("save gpu log failed")
 
     def stop(self):
         if hasattr(self, "proc"):