akka/akka — pull request #2126 by ktoso (2014-04-10 11:00:11+00:00)
Title: =doc #3986 Cluster Singleton should not be used with AutoDown

Documented that auto-downing is potentially unsafe. Made this a small section to highlight problems with singletons in general - I know it's a little bit explained above, but made sense to extract as a section about "potential problems" IMHO.