Merge pull request #5357 from minrk/smb-fails

catch exception in copystat

IPython/html/services/notebooks/filenbmanager.py

@@ -85,7 +85,18 b' class FileNotebookManager(NotebookManager):'
                 os.mkdir(new)
             except:
                 raise TraitError("Couldn't create checkpoint dir %r" % new)
-
+    
+    def _copy(self, src, dest):
+        """copy src to dest
+        
+        like shutil.copy2, but log errors in copystat
+        """
+        shutil.copyfile(src, dest)
+        try:
+            shutil.copystat(src, dest)
+        except OSError as e:
+            self.log.debug("copystat on %s failed", dest, exc_info=True)
+    
     def get_notebook_names(self, path=''):
         """List all notebook names in the notebook dir and path."""
         path = path.strip('/')
@@ -432,7 +443,7 b' class FileNotebookManager(NotebookManager):'
         self.log.debug("creating checkpoint for notebook %s", name)
         if not os.path.exists(self.checkpoint_dir):
             os.mkdir(self.checkpoint_dir)
-        shutil.copy2(nb_path, cp_path)
+        self._copy(nb_path, cp_path)
         
         # return the checkpoint info
         return self.get_checkpoint_model(checkpoint_id, name, path)
@@ -465,7 +476,7 b' class FileNotebookManager(NotebookManager):'
         # ensure notebook is readable (never restore from an unreadable notebook)
         with io.open(cp_path, 'r', encoding='utf-8') as f:
             current.read(f, u'json')
-        shutil.copy2(cp_path, nb_path)
+        self._copy(cp_path, nb_path)
         self.log.debug("copying %s -> %s", cp_path, nb_path)
     
     def delete_checkpoint(self, checkpoint_id, name, path=''):