title: drupal rebuild content access HTTP error 503 occurred
body: <p>I have a multisite drupal  installation with domain access module. Off late, I have started getting this warning 'need to build access permission'. Also, I went tried rebuild the access permission, I get 'An HTTP error 503 occurred. /batch?id=24&amp;op=do' </p>
  
  <p>The solutions suggest that I disable the modules and rebuild the content access permissions.</p>
  
  <p>the sites seem to have suddenly gone beserk. I get access denied for for unauthenticated users.</p>
  
  <p>I have live sites. Is there an alternative solution to it?</p>
  
  <p>Thanks in advance :)</p>