gistfile1.diff

diff --git a/nova/virt/libvirt/connection.py b/nova/virt/libvirt/connection.py
index a0e2176..af9b81c 100644
--- a/nova/virt/libvirt/connection.py
+++ b/nova/virt/libvirt/connection.py
@@ -997,6 +997,8 @@ class LibvirtConnection(driver.ComputeDriver):
                 # This could be a windows image, or a vmdk format disk
                 LOG.warn(_('instance %(inst_name)s: ignoring error injecting'
                         ' data into image %(img_id)s (%(e)s)') % locals())
+                import traceback
+                LOG.debug(traceback.format_exc())
 
         if FLAGS.libvirt_type == 'lxc':
             disk.setup_container(basepath('disk'),