Print driver exception on retype

If the driver raises an exception, make sure it is printed. Also change
the logging level from info to error because an exception should not be
thrown under normal conditions.

Change-Id: I003959c3f7c7667124ef61911587012fd4e1d667
Closes-Bug: #1268294

diff --git a/cinder/volume/manager.py b/cinder/volume/manager.py
index d95b0b0e87ef5ff9ad9cbb31bfb8a2469d76792f..fdb3f7e8bab0bd79fa758afadf00e428b3f6141e 100644 (file)
--- a/cinder/volume/manager.py
+++ b/cinder/volume/manager.py
@@ -1101,11 +1101,12 @@ class VolumeManager(manager.SchedulerDependentManager):
                                              diff, host)
                 if retyped:
                     LOG.info(_("Volume %s: retyped succesfully"), volume_id)
-            except Exception:
+            except Exception as ex:
                 retyped = False
-                LOG.info(_("Volume %s: driver error when trying to retype, "
-                           "falling back to generic mechanism."),
-                         volume_ref['id'])
+                LOG.error(_("Volume %s: driver error when trying to retype, "
+                            "falling back to generic mechanism."),
+                          volume_ref['id'])
+                LOG.exception(ex)
 
         # We could not change the type, so we need to migrate the volume, where
         # the destination volume will be of the new type