yahoo-eng-team team mailing list archive

["Davanum Srinivas \(DIMS\)" <davanum@xxxxxxxxx>]

Seeing a bunch of failures in gate - see
https://bugs.launchpad.net/nova/+bug/1254890 for the same behavior we
see there that was originally reported in this bug.

** Summary changed:

- refactoring of qemu-nbd error handling
+ mount nbd hangs because of previous umount failure

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

** Changed in: nova
   Importance: Undecided => High

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

Title:
  mount nbd hangs because of previous umount failure

Status in OpenStack Compute (Nova):
  Confirmed

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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