Issue #8942: race condition when deleting a repository and associated distribution

Issue #8942

 

 **Ticket moved to GitHub**: "pulp/pulpcore/2019":https://github.com/pulp/pulpcore/issues/2019 




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 In our katello tests, we have some 'cleanup' code that: 

 list and then deletes a repository with a given name 
 list and then deletes a remote with a given name 
 list and then deletes a distribution with a given name 
 wait on all the tasks generated from above 

 This has worked for quite a while, but after upgrading from pulp-container 2.3 to 2.6, we started seeing an error (ISE) from the server: 

 ``` 
 LookupError: view not found 
 ``` 
 when trying to list the distributions on the 3rd step.   

 I'm not sure if the pulp code is running faster, or slower, but it appears that there is a consistent race condition occuring.    I can modify the code to poll the tasks after the repo delete, and it seems to work find (so this isn't blocking us) 

 Here's the full traceback: 

 ``` 

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         Jun 21 16:14:09 devel2 pulpcore-api: pulp [b51142c5bced40989a59403cf6e92fd8]: django.request:ERROR: Internal Server Error: /pulp/api/v3/distributions/container/container/ 
         Jun 21 16:14:09 devel2 pulpcore-api: Traceback (most recent call last): 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner 
         Jun 21 16:14:09 devel2 pulpcore-api: response = get_response(request) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/django/core/handlers/base.py", line 115, in _get_response 
         Jun 21 16:14:09 devel2 pulpcore-api: response = self.process_exception_by_middleware(e, request) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/django/core/handlers/base.py", line 113, in _get_response 
         Jun 21 16:14:09 devel2 pulpcore-api: response = wrapped_callback(request, *callback_args, **callback_kwargs) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view 
         Jun 21 16:14:09 devel2 pulpcore-api: return view_func(*args, **kwargs) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/viewsets.py", line 125, in view 
         Jun 21 16:14:09 devel2 pulpcore-api: return self.dispatch(request, *args, **kwargs) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/views.py", line 509, in dispatch 
         Jun 21 16:14:09 devel2 pulpcore-api: response = self.handle_exception(exc) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/views.py", line 469, in handle_exception 
         Jun 21 16:14:09 devel2 pulpcore-api: self.raise_uncaught_exception(exc) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception 
         Jun 21 16:14:09 devel2 pulpcore-api: raise exc 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/views.py", line 506, in dispatch 
         Jun 21 16:14:09 devel2 pulpcore-api: response = handler(request, *args, **kwargs) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/mixins.py", line 43, in list 
         Jun 21 16:14:09 devel2 pulpcore-api: return self.get_paginated_response(serializer.data) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/serializers.py", line 745, in data 
         Jun 21 16:14:09 devel2 pulpcore-api: ret = super().data 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/serializers.py", line 246, in data 
         Jun 21 16:14:09 devel2 pulpcore-api: self._data = self.to_representation(self.instance) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/serializers.py", line 664, in to_representation 
         Jun 21 16:14:09 devel2 pulpcore-api: self.child.to_representation(item) for item in iterable 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/serializers.py", line 664, in <listcomp> 
         Jun 21 16:14:09 devel2 pulpcore-api: self.child.to_representation(item) for item in iterable 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/serializers.py", line 515, in to_representation 
         Jun 21 16:14:09 devel2 pulpcore-api: ret[field.field_name] = field.to_representation(attribute) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/rest_framework/relations.py", line 401, in to_representation 
         Jun 21 16:14:09 devel2 pulpcore-api: url = self.get_url(value, self.view_name, request, format) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/pulpcore/app/serializers/fields.py", line 210, in get_url 
         Jun 21 16:14:09 devel2 pulpcore-api: repo_url = rvr_field.get_url(obj.repository, None, request, *args, **kwargs) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/pulpcore/app/serializers/fields.py", line 198, in get_url 
         Jun 21 16:14:09 devel2 pulpcore-api: return super().get_url(obj, self.view_name, request, *args, **kwargs) + "versions/" 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/pulpcore/app/serializers/base.py", line 236, in get_url 
         Jun 21 16:14:09 devel2 pulpcore-api: view_name = self._view_name(obj) 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/pulpcore/app/serializers/base.py", line 231, in _view_name 
         Jun 21 16:14:09 devel2 pulpcore-api: return get_view_name_for_model(obj, "detail") 
         Jun 21 16:14:09 devel2 pulpcore-api: File "/usr/lib/python3.6/site-packages/pulpcore/app/util.py", line 78, in get_view_name_for_model 
         Jun 21 16:14:09 devel2 pulpcore-api: raise LookupError("view not found") 
         Jun 21 16:14:09 devel2 pulpcore-api: LookupError: view not found 
         Jun 21 16:14:09 devel2 pulpcore-api: pulp [b51142c5bced40989a59403cf6e92fd8]:    - - [21/Jun/2021:16:14:09 +0000] "GET /pulp/api/v3/distributions/container/container/?name=Default_Organization-Test-busybox-library HTTP/1.1" 500 27 "-" "OpenAPI-Generator/2.4.0/ruby" 
 ```
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Issue #8942
