jubatus/jubatus — pull request #789 by kumagi (2014-05-20 09:03:51+00:00)
Title: fix #777: delete_watcher should handle ZOO_SESSION_EVENT correctly

fix #777

When Jubatus worker node is deleted in ZK, correspondent Jubatus server will shutdown, by specification.
But the behavior of ZK failover, Jubatus server logs incorrectly like `cannot watch the path`.
It is confusing log. We should handle the event collectly.