Pulp

Issue #4060

Updated by amacdona@redhat.com about 6 years ago

Note: This problem occurs because content_2 (below) either is passed by the QueryExisting stage twice. This problem will occur in the save stage. Either way, 2 or more dupes are in the Queue for the save stage at the same time. Whether the dupes are saved in separate batches or together in 1 batch, we will fail with an integrity error.  

 I've encountered this while implementing Docker sync, so there isn't a simple reproducer yet. This issue occurs when a sync has multiple metadata files that refer to the same content, which has the same artifact. 

 metadata_1.artifacts = [content_1, content_2] 
 metadata_2.artifacts = [content_2, content_3] 

 content_2 and its artifact are able to pass through the pipeline twice resulting in a duplicate key. 

 <pre> 
 django.db.utils.IntegrityError: duplicate key value violates unique constraint "pulp_app_artifact_sha256_key" 
 </pre> 


 The actual error occurs in the ArtifactSaver stage during a bulk save, but AFAICT this stage needs to rely on unique units to allow bulk_save.  

 Full traceback: 

 <pre> 
 Traceback (most recent call last): 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/rq/worker.py", line 793, in perform_job 
     rv = job.perform() 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/rq/job.py", line 599, in perform 
     self._result = self._execute() 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/rq/job.py", line 605, in _execute 
     return self.func(*self.args, **self.kwargs) 
   File "/home/vagrant/devel/pulp_docker/pulp_docker/app/tasks/synchronizing.py", line 44, in synchronize 
     DeclarativeVersion(first_stage, repository).create() 
   File "/home/vagrant/devel/pulp/plugin/pulpcore/plugin/stages/declarative_version.py", line 125, in create 
     loop.run_until_complete(pipeline) 
   File "/usr/lib64/python3.6/asyncio/base_events.py", line 468, in run_until_complete 
     return future.result() 
   File "/home/vagrant/devel/pulp/plugin/pulpcore/plugin/stages/api.py", line 128, in create_pipeline 
     await asyncio.gather(*futures) 
   File "/home/vagrant/devel/pulp/plugin/pulpcore/plugin/stages/artifact_stages.py", line 323, in __call__ 
     Artifact.objects.bulk_create(artifacts_to_save) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method 
     return getattr(self.get_queryset(), name)(*args, **kwargs) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/models/query.py", line 465, in bulk_create 
     ids = self._batched_insert(objs_without_pk, fields, batch_size) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/models/query.py", line 1149, in _batched_insert 
     inserted_id = self._insert(item, fields=fields, using=self.db, return_id=True) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/models/query.py", line 1136, in _insert 
     return query.get_compiler(using=using).execute_sql(return_id) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/models/sql/compiler.py", line 1289, in execute_sql 
     cursor.execute(sql, params) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute 
     return super().execute(sql, params) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/backends/utils.py", line 68, in execute 
     return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers 
     return executor(sql, params, many, context) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute 
     return self.cursor.execute(sql, params) 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/utils.py", line 89, in __exit__ 
     raise dj_exc_value.with_traceback(traceback) from exc_value 
   File "/home/vagrant/.virtualenvs/pulp/lib64/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute 
     return self.cursor.execute(sql, params) 
 django.db.utils.IntegrityError: duplicate key value violates unique constraint "pulp_app_artifact_sha256_key" 
 DETAIL:    Key (sha256)=(8ddc19f16526912237dd8af81971d5e4dd0587907234be2b83e249518d5b673f) already exists. 

 </pre>

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