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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Changed in: nova
     Assignee: Matt Riedemann (mriedem) => iain MacDonnell (imacdonn)

** Also affects: nova/rocky
   Importance: Undecided
       Status: New

** Changed in: nova/rocky
       Status: New => Fix Released

** Changed in: nova/rocky
   Importance: Undecided => Medium

** Changed in: nova/rocky
     Assignee: (unassigned) => iain MacDonnell (imacdonn)

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https://bugs.launchpad.net/bugs/1796192

Title:
  online_data_migrations exceptions quietly masked

Status in Cinder:
  Fix Released
Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) rocky series:
  Fix Released

Bug description:
  When online_data_migrations raise exceptions, nova/cinder-manage
  catches the exception, prints a fairly useless "something didn't work"
  message, and moves on. Two issues:

  1) The user(/admin) has no way to see what actually failed (exception is not logged)
  2) The command returns exit status 0, as if all possible migrations have been completed successfully - this can cause failures to get missed, especially if automated

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