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[Sonu <sonu.sudhakaran@xxxxxxxxx>]

Public bug reported:

As of today, OvsdbMonitor used in neutron-openswitch-agent module, re-spawns the monitor in case of any verb that appears on the stderr of the child monitor process irrespective of the severity or relevance.
It is not ideal to restart child monitor process when the errors are not fatal or error, such as warnings from a plugin driver that echos warnings to the stderr etc.

And if such errors appears periodically, there are two side effects  
    a) Too frequent monitor processes could result in db.sock contention.
    b) Frequent re-starts, would result in neutron agent missing interface additions. 

In ideal case, only fatal errors where it would effect the monitoring or
change detection on bridges ports and interfaces should result in
restart of the monitor, not like the case as it exists today.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1458770

Title:
  OvsdbMonitor module should respawn monitor only on specific failures

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  As of today, OvsdbMonitor used in neutron-openswitch-agent module, re-spawns the monitor in case of any verb that appears on the stderr of the child monitor process irrespective of the severity or relevance.
  It is not ideal to restart child monitor process when the errors are not fatal or error, such as warnings from a plugin driver that echos warnings to the stderr etc.

  And if such errors appears periodically, there are two side effects  
      a) Too frequent monitor processes could result in db.sock contention.
      b) Frequent re-starts, would result in neutron agent missing interface additions. 

  In ideal case, only fatal errors where it would effect the monitoring
  or change detection on bridges ports and interfaces should result in
  restart of the monitor, not like the case as it exists today.

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