Make canceling view non-atomic to fix 500 errors with job bursts (#13072)

* Make canceling view non-atomic to fix 500 errors with job bursts

* Update test calls for cancel method changes

awx/api/generics.py

@@ -13,7 +13,7 @@ from django.contrib.auth import views as auth_views
 from django.contrib.contenttypes.models import ContentType
 from django.core.cache import cache
 from django.core.exceptions import FieldDoesNotExist
-from django.db import connection
+from django.db import connection, transaction
 from django.db.models.fields.related import OneToOneRel
 from django.http import QueryDict
 from django.shortcuts import get_object_or_404
@@ -64,6 +64,7 @@ __all__ = [
     'ParentMixin',
     'SubListAttachDetachAPIView',
     'CopyAPIView',
+    'GenericCancelView',
     'BaseUsersList',
 ]
 
@@ -985,6 +986,23 @@ class CopyAPIView(GenericAPIView):
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
 
 
+class GenericCancelView(RetrieveAPIView):
+    # In subclass set model, serializer_class
+    obj_permission_type = 'cancel'
+
+    @transaction.non_atomic_requests
+    def dispatch(self, *args, **kwargs):
+        return super(GenericCancelView, self).dispatch(*args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        obj = self.get_object()
+        if obj.can_cancel:
+            obj.cancel()
+            return Response(status=status.HTTP_202_ACCEPTED)
+        else:
+            return self.http_method_not_allowed(request, *args, **kwargs)
+
+
 class BaseUsersList(SubListCreateAttachDetachAPIView):
     def post(self, request, *args, **kwargs):
         ret = super(BaseUsersList, self).post(request, *args, **kwargs)

awx/api/views/__init__.py

@@ -69,6 +69,7 @@ from awx.api.generics import (
     APIView,
     BaseUsersList,
     CopyAPIView,
+    GenericCancelView,
     GenericAPIView,
     ListAPIView,
     ListCreateAPIView,
@@ -976,20 +977,11 @@ class SystemJobEventsList(SubListAPIView):
         return job.get_event_queryset()
 
 
-class ProjectUpdateCancel(RetrieveAPIView):
+class ProjectUpdateCancel(GenericCancelView):
 
     model = models.ProjectUpdate
-    obj_permission_type = 'cancel'
     serializer_class = serializers.ProjectUpdateCancelSerializer
 
-    def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
-
 
 class ProjectUpdateNotificationsList(SubListAPIView):
 
@@ -2262,20 +2254,11 @@ class InventoryUpdateCredentialsList(SubListAPIView):
     relationship = 'credentials'
 
 
-class InventoryUpdateCancel(RetrieveAPIView):
+class InventoryUpdateCancel(GenericCancelView):
 
     model = models.InventoryUpdate
-    obj_permission_type = 'cancel'
     serializer_class = serializers.InventoryUpdateCancelSerializer
 
-    def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
-
 
 class InventoryUpdateNotificationsList(SubListAPIView):
 
@@ -3352,20 +3335,15 @@ class WorkflowJobWorkflowNodesList(SubListAPIView):
         return super(WorkflowJobWorkflowNodesList, self).get_queryset().order_by('id')
 
 
-class WorkflowJobCancel(RetrieveAPIView):
+class WorkflowJobCancel(GenericCancelView):
 
     model = models.WorkflowJob
-    obj_permission_type = 'cancel'
     serializer_class = serializers.WorkflowJobCancelSerializer
 
     def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            ScheduleWorkflowManager().schedule()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
+        r = super().post(request, *args, **kwargs)
+        ScheduleWorkflowManager().schedule()
+        return r
 
 
 class WorkflowJobNotificationsList(SubListAPIView):
@@ -3521,20 +3499,11 @@ class JobActivityStreamList(SubListAPIView):
     search_fields = ('changes',)
 
 
-class JobCancel(RetrieveAPIView):
+class JobCancel(GenericCancelView):
 
     model = models.Job
-    obj_permission_type = 'cancel'
     serializer_class = serializers.JobCancelSerializer
 
-    def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
-
 
 class JobRelaunch(RetrieveAPIView):
 
@@ -4005,20 +3974,11 @@ class AdHocCommandDetail(UnifiedJobDeletionMixin, RetrieveDestroyAPIView):
     serializer_class = serializers.AdHocCommandDetailSerializer
 
 
-class AdHocCommandCancel(RetrieveAPIView):
+class AdHocCommandCancel(GenericCancelView):
 
     model = models.AdHocCommand
-    obj_permission_type = 'cancel'
     serializer_class = serializers.AdHocCommandCancelSerializer
 
-    def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
-
 
 class AdHocCommandRelaunch(GenericAPIView):
 
@@ -4153,20 +4113,11 @@ class SystemJobDetail(UnifiedJobDeletionMixin, RetrieveDestroyAPIView):
     serializer_class = serializers.SystemJobSerializer
 
 
-class SystemJobCancel(RetrieveAPIView):
+class SystemJobCancel(GenericCancelView):
 
     model = models.SystemJob
-    obj_permission_type = 'cancel'
     serializer_class = serializers.SystemJobCancelSerializer
 
-    def post(self, request, *args, **kwargs):
-        obj = self.get_object()
-        if obj.can_cancel:
-            obj.cancel()
-            return Response(status=status.HTTP_202_ACCEPTED)
-        else:
-            return self.http_method_not_allowed(request, *args, **kwargs)
-
 
 class SystemJobNotificationsList(SubListAPIView):