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[Eugene Nikanorov <enikanorov@xxxxxxxxxxxx>]

Public bug reported:

This well-known error may appear when updating agents table with heartbeat information.
The reason for this error is mysql backend configured as multi-master cluster.

Usual solution is to apply retries here, which was not done for this
particular case.

As a result of this deadlock various side effects could arise such as
port binding failures or  resource rescheduling.

** Affects: neutron
     Importance: Undecided
     Assignee: Eugene Nikanorov (enikanorov)
         Status: In Progress

** Changed in: neutron
     Assignee: (unassigned) => Eugene Nikanorov (enikanorov)

** Description changed:

  This well-known error may appear when updating agents table with heartbeat information.
  The reason for this error is mysql backend configured as multi-master cluster.
  
  Usual solution is to apply retries here, which was not done for this
  particular case.
+ 
+ As a result of this deadlock various side effects could arise such as
+ port binding failures or  resource rescheduling.

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https://bugs.launchpad.net/bugs/1560724

Title:
  Deadlock errors when updating agents table

Status in neutron:
  In Progress

Bug description:
  This well-known error may appear when updating agents table with heartbeat information.
  The reason for this error is mysql backend configured as multi-master cluster.

  Usual solution is to apply retries here, which was not done for this
  particular case.

  As a result of this deadlock various side effects could arise such as
  port binding failures or  resource rescheduling.

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