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[Niall Bunting <niall.bunting@xxxxxxx>]

Public bug reported:

When working on a new test I ran into this, the set should not fail due
the tags being deleted.

======================================================================
FAIL: glance.tests.unit.v2.test_images_resource.TestImagesController.test_delete_deactivated_images_anyone
tags: worker-0
----------------------------------------------------------------------
Traceback (most recent call last):
  File "glance/tests/unit/v2/test_images_resource.py", line 2034, in test_delete_deactivated_images_anyone
    self.controller.delete(request, UUID1)
  File "glance/common/utils.py", line 362, in wrapped
    return func(self, req, *args, **kwargs)
  File "glance/api/v2/images.py", line 236, in delete
    image_repo.remove(image)
  File "glance/domain/proxy.py", line 104, in remove
    result = self.base.remove(base_item)
  File "glance/notifier.py", line 487, in remove
    super(ImageRepoProxy, self).remove(image)
  File "glance/domain/proxy.py", line 104, in remove
    result = self.base.remove(base_item)
  File "glance/domain/proxy.py", line 104, in remove
    result = self.base.remove(base_item)
  File "glance/domain/proxy.py", line 104, in remove
    result = self.base.remove(base_item)
  File "glance/domain/proxy.py", line 104, in remove
    result = self.base.remove(base_item)
  File "glance/db/__init__.py", line 294, in remove
    new_values = self.db_api.image_destroy(self.context, image.image_id)
  File "glance/db/simple/api.py", line 64, in wrapped
    output = func(*args, **kwargs)
  File "glance/db/simple/api.py", line 761, in image_destroy
    for tag in tags:
RuntimeError: Set changed size during iteration

** Affects: glance
     Importance: Undecided
     Assignee: Niall Bunting (niall-bunting)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1555275

Title:
  Tags set changes on delete

Status in Glance:
  In Progress

Bug description:
  When working on a new test I ran into this, the set should not fail
  due the tags being deleted.

  ======================================================================
  FAIL: glance.tests.unit.v2.test_images_resource.TestImagesController.test_delete_deactivated_images_anyone
  tags: worker-0
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "glance/tests/unit/v2/test_images_resource.py", line 2034, in test_delete_deactivated_images_anyone
      self.controller.delete(request, UUID1)
    File "glance/common/utils.py", line 362, in wrapped
      return func(self, req, *args, **kwargs)
    File "glance/api/v2/images.py", line 236, in delete
      image_repo.remove(image)
    File "glance/domain/proxy.py", line 104, in remove
      result = self.base.remove(base_item)
    File "glance/notifier.py", line 487, in remove
      super(ImageRepoProxy, self).remove(image)
    File "glance/domain/proxy.py", line 104, in remove
      result = self.base.remove(base_item)
    File "glance/domain/proxy.py", line 104, in remove
      result = self.base.remove(base_item)
    File "glance/domain/proxy.py", line 104, in remove
      result = self.base.remove(base_item)
    File "glance/domain/proxy.py", line 104, in remove
      result = self.base.remove(base_item)
    File "glance/db/__init__.py", line 294, in remove
      new_values = self.db_api.image_destroy(self.context, image.image_id)
    File "glance/db/simple/api.py", line 64, in wrapped
      output = func(*args, **kwargs)
    File "glance/db/simple/api.py", line 761, in image_destroy
      for tag in tags:
  RuntimeError: Set changed size during iteration

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