Live disk migration is failing with NullPointerException during the CloneImageGroupVolumesStructure stage

Solution Verified - Updated -

Issue

  • LSM is failing during CloneImageGroupVolumesStructure with NullPointerException and below information is logged in the engine log.
2018-12-23 08:09:08,896-05 ERROR [org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] (EE-ManagedThreadFactory-engineScheduled-Thread-57) [4b47a12a-5ea3-4eeb-bee3-46f39b284a10] Command 'CloneImageGroupVolumesStructure' id: '84e68dda-32f6-4b53-9490-685040eec503' with children [] failed when attempting to perform the next operation, marking as 'ACTIVE'
2018-12-23 08:09:08,896-05 ERROR [org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] (EE-ManagedThreadFactory-engineScheduled-Thread-57) [4b47a12a-5ea3-4eeb-bee3-46f39b284a10] null: java.lang.NullPointerException
2018-12-23 08:09:08,896-05 INFO  [org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] (EE-ManagedThreadFactory-engineScheduled-Thread-57) [4b47a12a-5ea3-4eeb-bee3-46f39b284a10] Command 'CloneImageGroupVolumesStructure' id: '84e68dda-32f6-4b53-9490-685040eec503' child commands '[]' executions were completed, status 'FAILED'
  • It is failing in the getVolumeInfo call where engine receives the size of the disk as 0 and status as INVALID.

Environment

  • Red Hat Virtualization 4.2.

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