I'm using some tools (maas-deploy-node [1]) to quickly call 'acquire' and then 'start' for a node, and I often end up with the node not being powered on. I have to add some sleeps to work around.
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[1] http://bazaar.launchpad.net/~virtual-maasers/+junk/maas-libvirt-utils/view/head:/maas-deploy-node
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: maas-region-controller 1.3+bzr1461+dfsg-0ubuntu2 [modified: usr/share/maas/preseeds/preseed_xinstall]
ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Fri May 17 10:49:26 2013
InstallationDate: Installed on 2011-11-16 (547 days ago)
InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=screen-bce
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions:
python-django-maas 1.3+bzr1461+dfsg-0ubuntu2
apparmor 2.8.0-0ubuntu11
SourcePackage: maas
UpgradeStatus: Upgraded to raring on 2013-05-09 (8 days ago)
modified.conffile..etc.maas.maas.local.celeryconfig.py: [inaccessible: [Errno 13] Permission denied: '/etc/maas/maas_local_celeryconfig.py']
Are you sure this is not bug 1171418 ?
Juju acquires and starts very quickly and there's never been a problem with it.