I noticed my sagecell server fails to start.
Apr 12 16:48:52 hades sage[1016]: File "web_server.py", line 15, in <module>
Apr 12 16:48:52 hades sage[1016]: import handlers
Apr 12 16:48:52 hades sage[1016]: File "/home/sage/sagecell/sagecell/handlers.py", line 282, in <module>
Apr 12 16:48:52 hades sage[1016]: KernelRouter = sockjs.tornado.SockJSRouter(SockJSHandler, "/sockjs")
Apr 12 16:48:52 hades sage[1016]: File "/home/sage/sagecell/sage/local/lib/python2.7/site-packages/sockjs/tornado/router.py", line 111, in __init_
Apr 12 16:48:52 hades sage[1016]: self.io_loop)
Apr 12 16:48:52 hades sage[1016]: TypeError: __init__() takes exactly 3 arguments (4 given)