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[Bug 973413] Re: refactoring of qemu-nbd error handling

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: "Davanum Srinivas \(DIMS\)" <davanum@xxxxxxxxx>
Date: Mon, 18 Mar 2013 11:28:02 -0000
Reply-to: Bug 973413 <973413@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/973413

Title:
  refactoring of qemu-nbd error handling

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  Scenario: 
  While injecting data in an instance, if the umount command fails, the 
  qemu-nbd disconnect command also fails and the device becomes unusable.
  However, the device (/dev/nbd15) gets added back to the available device list.
  So, if another instance is launched (with some injected data), it tries to use the
  same nbd device (/dev/nbd15) which contains a stale connection.

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