diff --git a/nova/cmd/manage.py b/nova/cmd/manage.py
index 4c0d186..b839e77 100644
--- a/nova/cmd/manage.py
+++ b/nova/cmd/manage.py
@@ -720,50 +720,51 @@ class DbCommands(object):
                             "from table '%(table_name)s'.") %
                           {'records': records, 'table_name': table_name})
                 else:
                     print(_("There are %(records)d records in the "
                             "'%(table_name)s' table where the uuid or "
                             "instance_uuid column is NULL. Run this "
                             "command again with the --delete option after you "
                             "have backed up any necessary data.") %
                           {'records': records, 'table_name': table_name})
         # check to see if we didn't find anything
         if not records_found:
             print(_('There were no records found where '
                     'instance_uuid was NULL.'))

     def _run_migration(self, ctxt, max_count):
         ran = 0
         migrations = {}
         for migration_meth in self.online_migrations:
             count = max_count - ran
             try:
                 found, done = migration_meth(ctxt, count)
             except Exception:
                 print(_("Error attempting to run %(method)s") % dict(
                       method=migration_meth))
                 found = done = 0
+                raise

             name = migration_meth.__name__
             if found:
                 print(_('%(total)i rows matched query %(meth)s, %(done)i '
                         'migrated') % {'total': found,
                                        'meth': name,
                                        'done': done})
             migrations.setdefault(name, (0, 0))
             migrations[name] = (migrations[name][0] + found,
                                 migrations[name][1] + done)
             if max_count is not None:
                 ran += done
                 if ran >= max_count:
                     break
         return migrations

     @args('--max-count', metavar='<number>', dest='max_count',
           help='Maximum number of objects to consider')
     def online_data_migrations(self, max_count=None):
         ctxt = context.get_admin_context()
         if max_count is not None:
             try:
                 max_count = int(max_count)
             except ValueError:
                 max_count = -1