We have found another workaround for this in openstack clouds.  Somehow
this issue seems to be exacerbated by live_migration_tunnelled being on.

You may be able to work around this by setting 
live_migration_tunnelled = false
In your nova.conf or nova-compute.conf.

This is set by default for juju deployed openstack clouds.

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https://bugs.launchpad.net/bugs/1647389

Title:
  Regression: Live migrations can still crash after CVE-2016-5403 fix

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