[worker] Consumer.on_unknown_task must construct fake request to store result

celery/worker/consumer/consumer.py

@@ -33,6 +33,7 @@ from celery.exceptions import InvalidTaskError, NotRegistered
 from celery.utils import gethostname
 from celery.utils.functional import noop
 from celery.utils.log import get_logger
+from celery.utils.objects import Bunch
 from celery.utils.text import truncate
 from celery.utils.timeutils import humanize_seconds, rate
 
@@ -451,10 +452,20 @@ class Consumer(object):
         error(UNKNOWN_TASK_ERROR, exc, dump_body(message, body), exc_info=True)
         try:
             id_, name = message.headers['id'], message.headers['task']
+            root_id = message.headers['root_id']
         except KeyError:  # proto1
             id_, name = body['id'], body['task']
+            root_id = None
+        request = Bunch(
+            name=name, chord=None, root_id=root_id,
+            correlation_id=message.properties.get('correlation_id'),
+            reply_to=message.properties.get('reply_to'),
+            errbacks=None,
+        )
         message.reject_log_error(logger, self.connection_errors)
-        self.app.backend.mark_as_failure(id_, NotRegistered(name))
+        self.app.backend.mark_as_failure(
+            id_, NotRegistered(name), request=request,
+        )
         if self.event_dispatcher:
             self.event_dispatcher.send(
                 'task-failed', uuid=id_,