[rabbitmq-discuss] Pika IncompatibleProtocolError

Fri Apr 5 03:51:52 BST 2013

Hi,

I'm trying to use rabbitmq and pika on localhost for testing purposes, and 
I am receiving an IncompatibleProtocolError.

Here are the steps I'm following:

1) I start up rabbitmq-server, and when I run rabbitmqctl status I get:
Status of node rabbit at localhost ...
[{pid,390},
 {running_applications,
     [{rabbitmq_management_visualiser,"RabbitMQ Visualiser","3.0.4"},
      {rabbitmq_management,"RabbitMQ Management Console","3.0.4"},
      {rabbitmq_management_agent,"RabbitMQ Management Agent","3.0.4"},
      {rabbit,"RabbitMQ","3.0.4"},
      {os_mon,"CPO  CXC 138 46","2.2.10"},
      {rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.0.4"},
      {webmachine,"webmachine","1.9.1-rmq3.0.4-git52e62bc"},
      {mochiweb,"MochiMedia Web Server","2.3.1-rmq3.0.4-gitd541e9a"},
      {xmerl,"XML parser","1.3.2"},
      {inets,"INETS  CXC 138 49","5.9.2"},
      {mnesia,"MNESIA  CXC 138 12","4.7.1"},
      {amqp_client,"RabbitMQ AMQP Client","3.0.4"},
      {sasl,"SASL  CXC 138 11","2.2.1"},
      {stdlib,"ERTS  CXC 138 10","1.18.3"},
      {kernel,"ERTS  CXC 138 10","2.15.3"}]},
 {os,{unix,darwin}},
 {erlang_version,
     "Erlang R15B03 (erts-5.9.3.1) [source] [64-bit] [smp:8:8] 
[async-threads:30] [hipe] [kernel-poll:true] [dtrace]\n"},
 {memory,
     [{total,35653280},
      {connection_procs,5696},
      {queue_procs,27576},
      {plugins,152984},
      {other_proc,9868108},
      {mnesia,62360},
      {mgmt_db,47384},
      {msg_index,22960},
      {other_ets,1239568},
      {binary,522528},
      {code,18264216},
      {atom,695185},
      {other_system,4744715}]},
 {vm_memory_high_watermark,0.4},
 {vm_memory_limit,6523774566},
 {disk_free_limit,1000000000},
 {disk_free,199230787584},
 {file_descriptors,

 [{total_limit,156},{total_used,4},{sockets_limit,138},{sockets_used,1}]},
 {processes,[{limit,1048576},{used,196}]},
 {run_queue,0},
 {uptime,2667}]
...done.

2) I run the following code (RABBITMQ_USER='guest', RABBITMQ_PASS='guest', 
RABBIT_HOST='localhost')

credentials = pika.PlainCredentials(settings.RABBITMQ_USER,             
                                            settings.RABBITMQ_PASS)         

parameters = pika.ConnectionParameters(heartbeat_interval=5,            
                                               credentials=credentials,     

                                               host=settings.RABBIT_HOST)   

self.channel = None                                                         

self.connection = pika.SelectConnection(parameters, self.on_connected)

# ....

self.connection.ioloop.start()

3) I get the following traceback:

Traceback (most recent call last):
  File 
"/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", 
line 258, in _bootstrap
    self.run()
  File "/Users/will/queue/consumer.py", line 237, in run
    self.connection.ioloop.start()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/select_connection.py", 
line 108, in start
    self.poller.start()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/select_connection.py", 
line 336, in start
    self.poll()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/select_connection.py", 
line 351, in poll
    return self._handler(self.fileno, ERROR, error)
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/base_connection.py", 
line 315, in _handle_events
    self._handle_error(error)
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/base_connection.py", 
line 291, in _handle_error
    self._handle_disconnect()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/base_connection.py", 
line 240, in _handle_disconnect
    self._adapter_disconnect()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/base_connection.py", 
line 131, in _adapter_disconnect
    self._check_state_on_disconnect()
  File 
"/Users/will/python/lib/python2.7/site-packages/pika-0.9.13p0-py2.7.egg/pika/adapters/base_connection.py", 
line 143, in _check_state_on_disconnect
    raise exceptions.IncompatibleProtocolError
IncompatibleProtocolError

Any idea what could be causing this?  I'm running Mac OS X Mountain Lion. 
 Any help would be greatly appreciated.

Thanks!
-- Will
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