title: gsutil rsync exits after starting synchronization
body: <p>I'm trying to sync folders from Google compute engine instance to cloud storage, but it just exits without any pointers whatsoever. It says <em>Starting synchronization</em> and then goes back to the prompt.</p>
  
  <pre><code>gsutil -m rsync -r public/ gs://mybucket/public
  Building synchronization state...
  Starting synchronization
  </code></pre>
  
  <p>My gsutil version</p>
  
  <pre><code>gsutil version -l
  gsutil version: 4.6
  checksum: 397d8391fddbf1c48cc31f9c2911be68 (!= 70858e3360112a908c76273e6c947098)
  boto version: 2.30.0
  python version: 2.7.6 (default, Jun 22 2015, 17:58:13) [GCC 4.8.2]
  OS: Linux 3.16.0-62-generic
  multiprocessing available: True
  using cloud sdk: True
  config path: /etc/boto.cfg
  gsutil path: /usr/lib/google-cloud-sdk/platform/gsutil/gsutil
  compiled crcmod: False
  installed via package manager: False
  editable install: False
  </code></pre>
  
  <p>I also tried updating gsutil and gcloud components respectively, but that doesn't work either</p>
  
  <pre><code>gcloud components update
  You cannot perform this action because the component manager has been 
  disabled for this installation.  If you would like get the latest 
  version of the Google Cloud SDK, please see our main download page at:
  
    https://developers.google.com/cloud/sdk/
  
  ERROR: (gcloud.components.update) The component manager is disabled for this installation
  </code></pre>
  
  <p>Any ideas what I might be missing here?</p>