dstandish commented on code in PR #38907:
URL: https://github.com/apache/airflow/pull/38907#discussion_r1560430449


##########
airflow/models/taskinstance.py:
##########
@@ -539,7 +539,11 @@ def _refresh_from_db(
         task_instance.end_date = ti.end_date
         task_instance.duration = ti.duration
         task_instance.state = ti.state
-        task_instance.try_number = ti._try_number  # private attr to get value 
unaltered by accessor
+        try:
+            task_instance.try_number = ti._try_number  # private attr to get 
value unaltered by accessor
+        except AttributeError:
+            task_instance.try_number = ti.try_number  # the 
TaskInstancePydantic case

Review Comment:
   Yeah i'm actually working on that right now.  But I'm on a detour trying to 
get try number working properly from a logging perspective with db isolation 
enabled.  Try number immutability cannot come soon enough.



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