Comment 58 for bug 1596075

on the heat delete, I usually get errors like:
Resource DELETE failed: DBError: resources.n149: This Connection is closed

2016-07-13 23:02:14.582 1562 DEBUG heat.common.serializers [req-ad85b455-9fdc-4ecd-affb-642fb9302153 - don - default default] JSON response : {"stack": {"parent": null, "disable_rollback": true, "description": "Test subnet creation\n", "parameters": {"OS::project_id": "469300d96f9f406cacda5f001d387e52", "OS::stack_id": "1daa0af0-3795-4123-a2d5-2575d86bd6d0", "OS::stack_name": "t23"}, "deletion_time": null, "stack_name": "t23", "stack_user_project_id": "469300d96f9f406cacda5f001d387e52", "tags": null, "creation_time": "2016-07-13T12:46:25", "links": [{"href": "https://heat.sandvine.rocks/v1/469300d96f9f406cacda5f001d387e52/stacks/t23/1daa0af0-3795-4123-a2d5-2575d86bd6d0", "rel": "self"}], "capabilities": [], "notification_topics": [], "timeout_mins": null, "stack_status": "DELETE_FAILED", "stack_owner": null, "updated_time": "2016-07-13T23:00:58", "id": "1daa0af0-3795-4123-a2d5-2575d86bd6d0", "stack_status_reason": "Resource DELETE failed: DBError: resources.n149: This Connection is closed", "template_description": "Test subnet creation\n"}} to_json /usr/local/lib/python2.7/dist-packages/heat/common/serializers.py:40

i'll dig more