[Bug 838581] Re: Failures in db_pool code: 'NoneType' object has no attribute '_keymap' or not returning rows.

[David Kranz]

I upgraded from Scott's ppa and still see the signs of bug 855030:

AMQPChannelException: (404, u"NOT_FOUND - no exchange
'4b0a4421eb4a44ce96ce5f71c8523d16' in vhost '/'", (60, 40),
'Channel.basic_publish')

I looked at  /usr/lib/python2.7/dist-
packages/nova/db/sqlalchemy/session.py and verified that it had the
change mentioned in Scott's last comment. Many vms are created
successfully but eventually this always happens to me when I create
multiple instances with a single euca-run-instances command. I cannot
understand why others do not see this problem. I will reopen that bug.

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https://bugs.launchpad.net/bugs/838581

Title:
  Failures in db_pool code: 'NoneType' object has no attribute '_keymap'
  or not returning rows.

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