Created attachment 795110 [details]
logs and screenshot

Description of problem:
When vdsm fails in downloadImage action, engine gets the failure message from vdsm, but does not report about the failure.

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
1. add an external provider (glance) to rhevm with an image on it
2. block connectivity from rhos hosts to the device which contains the image
3. try to import the image to rhevm

Actual results:

#vdsm is failing to download the image from the given url:
636224e3-bc60-494b-9003-0db5841e711d::ERROR::2013-09-07 15:36:26,997::task::850::TaskManager.Task::(_setError) Task=`636224e3-bc60-494b-9003-0db5841e711d`::Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 857, in _run
    return fn(*args, **kargs)
  File "/usr/share/vdsm/storage/task.py", line 318, in run
    return self.cmd(*self.argslist, **self.argsdict)
  File "/usr/share/vdsm/storage/securable.py", line 68, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/share/vdsm/storage/sp.py", line 1873, in downloadImage
    .download(methodArgs, sdUUID, imgUUID, volUUID)
  File "/usr/share/vdsm/storage/image.py", line 1187, in download
    imageSharing.download(vol.getVolumePath(), methodArgs)
  File "/usr/share/vdsm/storage/imageSharing.py", line 76, in download
    downloadImageImpl(dstImgPath, methodArgs)
  File "/usr/share/vdsm/storage/imageSharing.py", line 44, in httpDownloadImage
    methodArgs.get("headers", {}))
  File "/usr/share/vdsm/storage/curlImgWrap.py", line 69, in download
    raise CurlError(rc, out, err)
CurlError: ecode=1, stdout=[], stderr=["fork_exec('/usr/bin/curl', 'curl', '-q', '--silent', '--fail', '--show-error', '-H', 'X-Auth-Token: 48ad7d2f2ed945e6abf8b06fbf44d624', 'http://opens-vdsb.qa.lab.tlv.redhat.com:9292/v1/images/75faa640-8934-4ee4-a9f3-3ede60ac866c')", "fork_exec('/bin/dd', 'dd', 'bs=2M', 'of=/rhev/data-center/7a93c0d1-1316-40e2-b946-3180c3415007/07b2ea73-27d3-46ba-832b-7fd5620443e4/images/176b1670-65ba-404f-a0f4-a26523d446ac/a5ef382e-5c4e-4f78-9eee-e413ab6dcad1')", "dd: writing `/rhev/data-center/7a93c0d1-1316-40e2-b946-3180c3415007/07b2ea73-27d3-46ba-832b-7fd5620443e4/images/176b1670-65ba-404f-a0f4-a26523d446ac/a5ef382e-5c4e-4f78-9eee-e413ab6dcad1': No space left on device", '0+255860 records in', '0+255859 records out', '1073741824 bytes (1.1 GB) copied, 231.588 s, 4.6 MB/s', 'curl: (23) Failed writing body (376 != 1448)'], message=None


#On engine.log:
, '--fail', '--show-error', '-H', 'X-Auth-Token: 48ad7d2f2ed945e6abf8b06fbf44d624', 'http://opens-vdsb.qa.lab.tlv.redhat.com:9292/v1/images/75faa640-8934-4ee4-a9f3-3ede60ac866c')", "fork_exec('/bin/dd', 'dd', 'bs=2M', 'of=/rhev/data-center/7a93c0d1-1316-40e2-b946-3180c3415007/07b2ea73-27d3-46ba-832b-7fd5620443e4/images/176b1670-65ba-404f-a0f4-a26523d446ac/a5ef382e-5c4e-4f78-9eee-e413ab6dcad1')", "dd: writing `/rhev/data-center/7a93c0d1-1316-40e2-b946-3180c3415007/07b2ea73-27d3-46ba-832b-7fd5620443e4/images/176b1670-65ba-404f-a0f4-a26523d446ac/a5ef382e-5c4e-4f78-9eee-e413ab6dcad1': No space left on device", '0+255860 records in', '0+255859 records out', '1073741824 bytes (1.1 GB) copied, 231.588 s, 4.6 MB/s', 'curl: (23) Failed writing body (376 != 1448)'], message=None,

On UI, there is an event about the disk removing that was done after the downloadImage failure.
There is no indication about the failure in DownloadImage

Expected results:
Engine should fail the task and revert it

Additional info:logs and screenshot