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[Bug 1204277] Re: nicira plugin - metadata access ops lead to eventlet deadlock

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Thu, 05 Sep 2013 15:44:32 -0000
Reply-to: Bug 1204277 <1204277@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1204277

Title:
  nicira plugin - metadata access ops lead to eventlet deadlock

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  This is the usual problem of the eventlet deadlock between rpc and mysql database, first reported in bug 1086173
  In this case it is exacerbated by the fact nvp uses eventlet too.

  This patch ensures NVP plugin operations are not encapsulated in a
  mysql transaction, thus removing the long transaction which might end
  up deadlocking with state reporting operations from the dhcp agent.

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