Reviewed:  https://review.openstack.org/373841
Committed: 
https://git.openstack.org/cgit/openstack/neutron/commit/?id=09d1185d24c30690358a9314c14fabaead2f4c78
Submitter: Jenkins
Branch:    master

commit 09d1185d24c30690358a9314c14fabaead2f4c78
Author: Oleg Bondarev <obonda...@mirantis.com>
Date:   Wed Sep 21 10:36:05 2016 +0300

    Do not retry default security group creation
    
    No need to retry creation of a default security group - it will
    always fail with DBDuplicate.
    The patch opens a transaction before calling to create_security_group()
    when creating default security group, thus avoiding db retries.
    
    Closes-Bug: #1625557
    Change-Id: Id15b55b097641325ac68275fe4bb3ebe93718cdd


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1625557

Title:
  Concurrent security groups creation fails with DBDuplicateEntry

Status in neutron:
  Fix Released

Bug description:
   - create_security_group() is wrapped with a db retry decorator
   - it calls _ensure_default_security_group() to create a default security 
group for a tenant if one does not exist 
   - _ensure_default_security_group() in turn calls back to 
create_security_group() to create a default security group
   - due to concurrency the creation of default security group my fail with 
DBDuplicateEntry
   - this is retried for max attempts and the request eventually fails

  Traceback: http://paste.openstack.org/show/581903/
  Example of failed job in rally: 
http://logs.openstack.org/04/371604/1/check/gate-rally-dsvm-neutron-rally/b1c384d/

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