2016-04-06 19:20:19 INFO    Starting job.
2016-04-06 19:20:19 INFO    Getting exising bzr branch from central store.
2016-04-06 19:20:19 INFO    [chan bzr SocketAsChannelAdapter] Opened sftp connection (server version 3)
2016-04-06 19:20:19 INFO    35 bytes transferred
2016-04-06 19:20:20 INFO    [chan bzr SocketAsChannelAdapter] Opened sftp connection (server version 3)
2016-04-06 19:20:22 INFO    Importing branch.
2016-04-06 19:20:22 INFO    
Traceback (most recent call last):
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/scripts/code-import-worker.py", line 96, in <module>
    sys.exit(script.main())
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/scripts/code-import-worker.py", line 91, in main
    return import_worker.run()
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/lp/codehosting/codeimport/worker.py", line 583, in run
    return self._doImport()
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/lp/codehosting/codeimport/worker.py", line 737, in _doImport
    inter_branch.fetch(limit=revision_limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/branch.py", line 722, in fetch
    self.fetch_objects(stop_revision, fetch_tags=fetch_tags, limit=limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/branch.py", line 745, in fetch_objects
    determine_wants, self.source.mapping, limit=limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/fetch.py", line 713, in fetch_objects
    progress=lambda text: report_git_progress(pb, text))
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/remote.py", line 425, in fetch_objects
    lambda x: os.write(fd, x), progress)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/remote.py", line 415, in fetch_pack
    pack_data, progress)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/remote.py", line 236, in fetch_pack
    graph_walker, pack_data, progress)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/dulwich/client.py", line 531, in fetch_pack
    graph_walker, wants, can_read)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/dulwich/client.py", line 370, in _handle_upload_pack_head
    have = graph_walker.next()
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/dulwich/object_store.py", line 1066, in next
    ps = self.get_parents(ret)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/lib/dulwich/object_store.py", line 200, in <lambda>
    return ObjectStoreGraphWalker(heads, lambda sha: self[sha].parents)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/object_store.py", line 677, in __getitem__
    _check_expected_sha(sha, commit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-17989/bzrplugins/git/object_store.py", line 155, in _check_expected_sha
    expected_sha))
AssertionError: Invalid sha for <Commit 200e553385e26edfaeabf9692bf898b21e05e9da>: 15c20b1013df80cece72b80ee96ca41302de5732
Import failed:
Traceback (most recent call last):
Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.