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pumpkin's Issues

RabbitMQ connection problems (kakai branch)

Recent changes cause problems with rabbit mq connection:

ERROR:Socket Error on fd 25: 104
Traceback (most recent call last):
  File "DRHarness.py", line 11, in <module>
    main()
  File "/home/pumpkin/pumpkin/pumpkin/Pumpkin.py", line 556, in main
    P.startContext()
  File "/home/pumpkin/pumpkin/pumpkin/Pumpkin.py", line 249, in startContext
    edispatch = ExternalDispatch(context)
  File "/home/pumpkin/pumpkin/pumpkin/PmkExternalDispatch.py", line 50, in __init__
    self.connection = self.__open_rabbitmq_connection()
  File "/home/pumpkin/pumpkin/pumpkin/PmkExternalDispatch.py", line 60, in __open_rabbitmq_connection
    connection = pika.BlockingConnection(pika.ConnectionParameters(host=host,  credentials=credentials, virtual_host=vhost))
  File "/usr/local/lib/python2.7/dist-packages/pika/adapters/blocking_connection.py", line 107, in __init__
    super(BlockingConnection, self).__init__(parameters, None, False)
  File "/usr/local/lib/python2.7/dist-packages/pika/adapters/base_connection.py", line 62, in __init__
    on_close_callback)
  File "/usr/local/lib/python2.7/dist-packages/pika/connection.py", line 590, in __init__
    self.connect()
  File "/usr/local/lib/python2.7/dist-packages/pika/adapters/blocking_connection.py", line 206, in connect
    if not self._adapter_connect():
  File "/usr/local/lib/python2.7/dist-packages/pika/adapters/blocking_connection.py", line 283, in _adapter_connect
    self.process_data_events()
  File "/usr/local/lib/python2.7/dist-packages/pika/adapters/blocking_connection.py", line 218, in process_data_events
    raise exceptions.ConnectionClosed()
pika.exceptions.ConnectionClosed

Seeds on different VMs at DAS-4 do not find each other

When running the Pumpkin framework for the Web Services and Cloud-based Systems course and trying to deploy different seeds on different VMs, the different seeds can not really find each other. We tried to run the 'tweetinject' and 'filter' seed on one VM and the 'collector' seed on another VM. The first VM did manage to find a 'collector' seed, but on a different IP address (maybe an IP address of another group).
The image below shows the output from running ./run_pumpkin.sh on the first VM
tweetinject_filter_seeds_error
The image below shows the output from running ./run_pumpkin.sh on the second VM
collector_seed_error
After this, there is no more output, the program just keeps running

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