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[shihanzhang <ayshihanzhang@xxxxxxx>]

Public bug reported:

My environment is stable/newton, I use rally to do stability tests, the details is below:
1. config a network with 2 dhcp-agent
2. config rally to do 40 bulk operation, each process is:create network->create subnet->delete subnet->delete network

I total do 100 times, the success rate is 1.6%, i check the neutron-server log with many db deadlock erros, there were
5 tables happen deadlock:ipamallocations,ipamsubnets,standardattributes,ports,provisioningblocks. 
the neutron-server log is http://paste.openstack.org/show/613359/

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1699938

Title:
  DB deadlock when bulk delete subnet

Status in neutron:
  New

Bug description:
  My environment is stable/newton, I use rally to do stability tests, the details is below:
  1. config a network with 2 dhcp-agent
  2. config rally to do 40 bulk operation, each process is:create network->create subnet->delete subnet->delete network

  I total do 100 times, the success rate is 1.6%, i check the neutron-server log with many db deadlock erros, there were
  5 tables happen deadlock:ipamallocations,ipamsubnets,standardattributes,ports,provisioningblocks. 
  the neutron-server log is http://paste.openstack.org/show/613359/

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