knife soloで vagrant で構築した Ubuntu14.04 に設定をしているのですが半分ぐらいの確率で以下のエラーが出ます。 Uploading the kitchen... ERROR: RuntimeError: Failed to launch command ["rsync", "-rL", "--chmod=ugo=rwX", "--rsh=ssh vagrant@ubuntu", "--delete-after", "--exclude=revision-deploys", "--exclude=tmp", "--exclude=.git", "--exclude=.hg", "--exclude=.svn", "--exclude=.bzr", "/cygdrive/C/Users/ironsand/dev/chef-trusty-ironsand/cookb