Im seeing the exact error for Grizzly release on Ubuntu server 13.04
Devstack script fails with [ERROR] stack.sh:191 g-api did not start

I could neither do it by firing the command manually. It throws a connection error for 'RabbitStrategy' object.

Command : 

cd /opt/stack/glance; /opt/stack/glance/bin/glance-api --config-file=/etc/glance/glance-api.conf

Output :

2013-06-19 13:05:13.567 23977 DEBUG glance.store [-] Attempting to import store glance.store.filesystem.Store _get_store_class /opt/stack/glance/glance/store/__init__.py:141
2013-06-19 13:05:13.568 23977 DEBUG glance.store [-] Registering store <class 'glance.store.filesystem.Store'> with schemes ('file', 'filesystem') create_stores /opt/stack/glance/glance/store/__init__.py:171
2013-06-19 13:05:13.568 23977 DEBUG glance.store.base [-] Late loading location class glance.store.filesystem.StoreLocation get_store_location_class /opt/stack/glance/glance/store/base.py:68
2013-06-19 13:05:13.568 23977 DEBUG glance.store.location [-] Registering scheme file with {'store_class': <class 'glance.store.filesystem.Store'>, 'location_class': <class 'glance.store.filesystem.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.568 23977 DEBUG glance.store.location [-] Registering scheme filesystem with {'store_class': <class 'glance.store.filesystem.Store'>, 'location_class': <class 'glance.store.filesystem.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.568 23977 DEBUG glance.store [-] Attempting to import store glance.store.http.Store _get_store_class /opt/stack/glance/glance/store/__init__.py:141
2013-06-19 13:05:13.568 23977 DEBUG glance.store [-] Registering store <class 'glance.store.http.Store'> with schemes ('http', 'https') create_stores /opt/stack/glance/glance/store/__init__.py:171
2013-06-19 13:05:13.569 23977 DEBUG glance.store.base [-] Late loading location class glance.store.http.StoreLocation get_store_location_class /opt/stack/glance/glance/store/base.py:68
2013-06-19 13:05:13.569 23977 DEBUG glance.store.location [-] Registering scheme http with {'store_class': <class 'glance.store.http.Store'>, 'location_class': <class 'glance.store.http.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.569 23977 DEBUG glance.store.location [-] Registering scheme https with {'store_class': <class 'glance.store.http.Store'>, 'location_class': <class 'glance.store.http.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.569 23977 DEBUG glance.store [-] Attempting to import store glance.store.rbd.Store _get_store_class /opt/stack/glance/glance/store/__init__.py:141
2013-06-19 13:05:13.570 23977 DEBUG glance.store [-] Registering store <class 'glance.store.rbd.Store'> with schemes ('rbd',) create_stores /opt/stack/glance/glance/store/__init__.py:171
2013-06-19 13:05:13.570 23977 DEBUG glance.store.base [-] Late loading location class glance.store.rbd.StoreLocation get_store_location_class /opt/stack/glance/glance/store/base.py:68
2013-06-19 13:05:13.570 23977 DEBUG glance.store.location [-] Registering scheme rbd with {'store_class': <class 'glance.store.rbd.Store'>, 'location_class': <class 'glance.store.rbd.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.570 23977 DEBUG glance.store [-] Attempting to import store glance.store.s3.Store _get_store_class /opt/stack/glance/glance/store/__init__.py:141
2013-06-19 13:05:13.571 23977 DEBUG glance.store [-] Registering store <class 'glance.store.s3.Store'> with schemes ('s3', 's3+http', 's3+https') create_stores /opt/stack/glance/glance/store/__init__.py:171
2013-06-19 13:05:13.571 23977 DEBUG glance.store.base [-] Late loading location class glance.store.s3.StoreLocation get_store_location_class /opt/stack/glance/glance/store/base.py:68
2013-06-19 13:05:13.571 23977 DEBUG glance.store.location [-] Registering scheme s3 with {'store_class': <class 'glance.store.s3.Store'>, 'location_class': <class 'glance.store.s3.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.571 23977 DEBUG glance.store.location [-] Registering scheme s3+http with {'store_class': <class 'glance.store.s3.Store'>, 'location_class': <class 'glance.store.s3.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.571 23977 DEBUG glance.store.location [-] Registering scheme s3+https with {'store_class': <class 'glance.store.s3.Store'>, 'location_class': <class 'glance.store.s3.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.571 23977 DEBUG glance.store [-] Attempting to import store glance.store.swift.Store _get_store_class /opt/stack/glance/glance/store/__init__.py:141
2013-06-19 13:05:13.580 23977 DEBUG glance.store [-] Registering store <function Store at 0x292d578> with schemes ('swift+https', 'swift', 'swift+http') create_stores /opt/stack/glance/glance/store/__init__.py:171
2013-06-19 13:05:13.580 23977 DEBUG glance.store.base [-] Late loading location class glance.store.swift.StoreLocation get_store_location_class /opt/stack/glance/glance/store/base.py:68
2013-06-19 13:05:13.581 23977 DEBUG glance.store.location [-] Registering scheme swift+https with {'store_class': <function Store at 0x292d578>, 'location_class': <class 'glance.store.swift.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.581 23977 DEBUG glance.store.location [-] Registering scheme swift+http with {'store_class': <function Store at 0x292d578>, 'location_class': <class 'glance.store.swift.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.581 23977 DEBUG glance.store.location [-] Registering scheme swift with {'store_class': <function Store at 0x292d578>, 'location_class': <class 'glance.store.swift.StoreLocation'>} register_scheme_map /opt/stack/glance/glance/store/location.py:85
2013-06-19 13:05:13.581 23977 DEBUG glance.common.config [-] Loading glance-api-keystone+cachemanagement from /etc/glance/glance-api-paste.ini load_paste_app /opt/stack/glance/glance/common/config.py:210
2013-06-19 13:05:13.605 23977 WARNING glance.api.v2.images [-] Could not find schema properties file schema-image.json. Continuing without custom properties
2013-06-19 13:05:13.703 23977 DEBUG glance.notifier [-] Converted strategy alias rabbit to glance.notifier.notify_kombu.RabbitStrategy __init__ /opt/stack/glance/glance/notifier/__init__.py:63
2013-06-19 13:05:13.709 23977 INFO glance.notifier.notify_kombu [-] Connecting to AMQP server on localhost:5672
2013-06-19 13:05:13.735 23977 CRITICAL glance [-] 'RabbitStrategy' object has no attribute 'connection_errors'

Any suggestion as to what would be wrong? Is this specific to Ubuntu 13.04?