nova-api running under apache mod_wsgi raises 500

[Alvaro Lopez]

The Opensack api returns the 'Retry-After' header as an integer. If nova is running behind apache using mod_wsgi, an error 500 is raised, instead of the actual exception because it expects the headers to be strings, not integers. The apache logs shows the following error:

   TypeError: expected byte string object for header value, value of type int found

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/24518

[Sean Dague (sdague)]

given that we are in rc freeze, this is going to need to be prioritized to go in

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/24518
Committed: http://github.com/openstack/nova/commit/1c46788b3e36f8d3d79b6f73e5b98d3ed6b48fbd
Submitter: Jenkins
Branch: master

commit 1c46788b3e36f8d3d79b6f73e5b98d3ed6b48fbd
Author: Alvaro Lopez Garcia <email address hidden>
Date: Tue Mar 19 15:04:25 2013 +0100

    Ensure that headers are returned as strings, not integers.

    The 'Retry-After' header was set as an integer, and it was causing that
    mod_wsgi failed with a 500 error, instead of the actual error. This
    ensures that the headers are converted to str.

    Fixes bug 1155585
    Change-Id: If1b1de2308ccdc6f0588c8df5dc896fe5f767dbe