[rabbitmq-discuss] Help with "AttributeError: 'BlockingConnection' object has no attribute 'disconnect'"

Tue Jan 21 19:28:55 GMT 2014

Looks like a bug. I’ve opened a ticket @ https://github.com/pika/pika/issues/435

Ultimately, you’re being disconnected from RabbitMQ which is causing pika to want to handle the disconnection cleanly, but somehow it’s missing in your version of pika.

Can you please provide the version of pika installed on the ticket?

import pika
pika.__version__

Regards,

Gavin

From: Badjatya, Nikunj Badjatya, Nikunj
Reply: Discussions about RabbitMQ rabbitmq-discuss at lists.rabbitmq.com
Date: January 21, 2014 at 2:26:11 PM
To: rabbitmq-discuss at lists.rabbitmq.com rabbitmq-discuss at lists.rabbitmq.com
Subject:  [rabbitmq-discuss] Help with "AttributeError: 'BlockingConnection' object has no attribute 'disconnect'"  
Hello All,

Need your help with the error I have been facing.

The channel creation (or the basic_publish operation) throws error as “AttributeError: 'BlockingConnection' object has no attribute 'disconnect'”, when there is a time gap between connection establishment and channel creation (or basic_publish operation).

I am using Pika python amqp client and running rabbitmq-server ver 3.1.3-1 on SLES-11sp3.

Python 2.6.8 (unknown, May 29 2012, 22:30:44)

[GCC 4.3.4 [gcc-4_3-branch revision 152973]] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import pika

>>> VEXCHANGE = 'exchange.external'

>>> connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost',connection_attempts=3,retry_delay=5))

>>> vchannel = connection.channel();

>>> BODY = "blahblah"

>>> vchannel.basic_publish(exchange=VEXCHANGE,routing_key='#',body=str(BODY),properties=pika.BasicProperties(delivery_mode = 2,))

This message is getting published without any issues. However, if after sometime (say 5 minutes) I do basic_publish again, I get below error.

>>> vchannel.basic_publish(exchange=VEXCHANGE,routing_key='#',body=str(BODY),properties=pika.BasicProperties(delivery_mode = 2,))

No handlers could be found for logger "pika.adapters.base_connection"

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 540, in basic_publish

    (properties, body), False)

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 1121, in _send_method

    self.connection.send_method(self.channel_number, method_frame, content)

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 249, in send_method

    self._send_method(channel_number, method_frame, content)

  File "/usr/lib64/python2.6/site-packages/pika/connection.py", line 1489, in _send_method

    self._send_frame(frame.Method(channel_number, method_frame))

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 388, in _send_frame

    super(BlockingConnection, self)._send_frame(frame_value)

  File "/usr/lib64/python2.6/site-packages/pika/connection.py", line 1476, in _send_frame

    self._flush_outbound()

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 348, in _flush_outbound

    if self._handle_write():

  File "/usr/lib64/python2.6/site-packages/pika/adapters/base_connection.py", line 338, in _handle_write

    return self._handle_error(error)

  File "/usr/lib64/python2.6/site-packages/pika/adapters/base_connection.py", line 282, in _handle_error

    self._handle_disconnect()

  File "/usr/lib64/python2.6/site-packages/pika/adapters/blocking_connection.py", line 318, in _handle_disconnect

    self.disconnect()

AttributeError: 'BlockingConnection' object has no attribute 'disconnect'

>>>

At this time, I get the same error when I run

>>>vchannel = connection.channel()

The config file has the default heartbeat set to 30 seconds.

Any idea on what causing this error to come?

Thanks,

Nikunj

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