Savanna-cluster in waiting state

Asked by sarita

After launch cluster my cluster remains in waiting state giving error time to time .

Error is as follows as:

  [31/Aug/2013 23:01:30] "GET /v1.0/0e07c2640ad843c6bd8bc651f1f90873/clusters/8cb3f13b-6322-4ead-8a51-d6aa89f4e55a HTTP/1.1" 200 1783 0.012812
Traceback (most recent call last):
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/", line 80, in _spawn_n_impl
    func(*args, **kwargs)
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/", line 584, in process_request
    proto.__init__(socket, address, self)
  File "/usr/lib/python2.7/", line 638, in __init__
  File "/usr/lib/python2.7/", line 342, in handle
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/", line 226, in handle_one_request
    self.raw_requestline = self.rfile.readline(self.server.url_length_limit)
  File "/usr/lib/python2.7/", line 476, in readline
    data = self._sock.recv(self._rbufsize)
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/", line 262, in recv
    timeout_exc=socket.timeout("timed out"))
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/hubs/", line 151, in trampoline
    listener = hub.add(hub.READ, fileno, current.switch)
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/hubs/", line 48, in add
    listener = BaseHub.add(self, evtype, fileno, cb)
  File "/root/savanna-venv3/local/lib/python2.7/site-packages/eventlet/hubs/", line 126, in add
    evtype, fileno, evtype))
RuntimeError: Second simultaneous read on fileno 6 detected. Unless you really know what you're doing, make sure that only one greenthread can read any particular socket. Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_prevent_multiple_readers(False)
(3051) accepted ('', 47343) - - [31/Aug/2013 23:01:33] "GET /v1.0/0e07c2640ad843c6bd8bc651f1f90873/clusters/8cb3f13b-6322-4ead-8a51-d6aa89f4e55a HTTP/1.1" 200 1783 0.011030

How to overcome this problem ?

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Dmitry Mescheryakov (dmitrymex) said :

The issues is caused by

For now I can advise apply the following patch:

That will not heal the problem completely, but should decrease chance of hitting the issue

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