python - Celery with RabbitMQ: AttributeError: 'DisabledBackend' object has no attribute '_get_task_meta_for' -

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I'm running.

We define the following work: 

  Celery import seller app = cerari ('work', broker = 'AMPP: // guest @ localhost //') @EpTasKeepExclude (X, Y): Return x + y   
 Then call it:  
  & gt; & Gt; & Gt; Add Import from Jobs & gt; & Gt; & Gt; Add.delay (4, 4)   
 But I get the following error:  
  attribute error: 'disabled backend' has no attribute in object ' _get_task_meta_for '  
 I am running celery and rabbit-amk server both. Oddly, celery worker reports the work to be successful:  
  [2014-04-22 19:12:01 03,608: information / main process] Trial test_saleary.ed [168c7d96-e41a- 41c9-80f5- 50b 24dcaff73] succeeded in 0.000435483998444: 19   
 Why is not this working?   
 
 
 Just continue to read the tutorial. It will be explained in the chapter.  
 To start the series you only need to provide the broker parameter, which is necessary to send messages about tasks. If you want to get information about the state and the results returned from finished tasks, you have to set the backend parameter. You can find the full list in the details.

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