[Qemu-devel] [Bug 1452062] Re: qemu-img will fail to convert images in 2.3.0

[Kevin Wolf]

The only possibly relevant change I can see in 2.3 is that the qcow2
driver added an additional error check to a truncate operation. Can you
please run qemu-img under strace -f and either provide the output as an
attachment or paste the relevant failing call(s) if you can recognise
them?

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https://bugs.launchpad.net/bugs/1452062

Title:
  qemu-img will fail to convert images in 2.3.0

Status in QEMU:
  Incomplete

Bug description:
  Hello guys,

      There seems to be a bug in qemu-img with 2.3.0 that wasn't there
  in 2.2.1  .... qemu convert will always fail converting.  See the
  output below:

  
  Started by upstream project "Create windows image" build number 73
  originally caused by:
   Started by user anonymous
  Building remotely on builder (builder lab) in workspace 
/var/lib/jenkins/remote/workspace/Prepare windows Image
  [Prepare WS2008R2 Image] $ /bin/sh -xe /tmp/hudson4138890034689910617.sh
  + sudo bash -x /var/images/prepare_windows.sh WS2008R2
  + set +x

  Preparing: windows
  Virtio CD: virtio-win-0.1.96.iso

  Sparsifying...
  qemu-img: error while compressing sector 11131648: Input/output error
  virt-sparsify: error: external command failed: qemu-img convert -f 
  qcow2 -O 'qcow2' -c -o 'compat=0.10' '/tmp/sparsifyb459a0.qcow2' 
  '/var/images/generated/WS2008R2.qcow2'

  virt-sparsify: If reporting bugs, run virt-sparsify with debugging 
  enabled (-v) and include the complete output.
  Build step 'Execute shell' marked build as failure
  Warning: you have no plugins providing access control for builds, so falling 
back to legacy behavior of permitting any downstream builds to be triggered
  Finished: FAILURE

  Thanks,
  Dave

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