Comment 2 for bug 1550639

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Matt Riedemann (mriedem) wrote : Re: After migrate volume being attached instance, the instance cann't run normally

What version of nova and cinder are you using?

I'm not familiar with the volume migration API in Cinder, but it looks like it calls out to Nova to perform a swap volume operation.

Per your comment 1, you're expecting that Cinder will handle the failure from the Nova swap volume operation and rollback the failure? That's reasonable but would need the Cinder team to weigh in here.

Do you have the Cinder logs from the failure to see why those don't rollback?