Response to review.

Fix no-submission retry delays bug.

undo unecessary thing

add get methods to allow for lack of default submission time limit

clarify the changelog entry

Author: wxtim

changes.d/fix.5712.md

@@ -1 +1 @@
-Fixed a bug preventing simulation of task retries if job submission unset.
+Fixed a bug preventing simulation of task retries if `submission retry delays` unset.

cylc/flow/task_events_mgr.py

@@ -778,7 +778,6 @@ def _process_message_check(
 
         if (
                 itask.state(TASK_STATUS_WAITING)
-                and itask.tdef.run_mode == 'live'
                 and
                 (
                     (
@@ -804,13 +803,13 @@ def _process_message_check(
                     f"[{itask}] "
                     f"{self.FLAG_RECEIVED_IGNORED}{message}{timestamp}"
                 )
-
-            else:
+                return False
+            elif flag == self.FLAG_POLLED_IGNORED:
                 LOG.warning(
                     f"[{itask}] "
                     f"{self.FLAG_POLLED_IGNORED}{message}{timestamp}"
                 )
-            return False
+                return False
 
         severity = cast(int, LOG_LEVELS.get(severity, INFO))
         # Demote log level to DEBUG if this is a message that duplicates what

cylc/flow/task_job_mgr.py

@@ -979,8 +979,8 @@ def _set_retry_timers(
             rtconfig = itask.tdef.rtconfig
 
         submit_delays = (
-            rtconfig['submission retry delays']
-            or itask.platform['submission retry delays']
+            rtconfig.get('submission retry delays', [])
+            or itask.platform.get('submission retry delays', [])
         )
 
         for key, delays in [
@@ -1000,10 +1000,7 @@ def _simulation_submit_task_jobs(self, itasks, workflow):
             itask.waiting_on_job_prep = False
             itask.submit_num += 1
             self._set_retry_timers(itask)
-            itask.platform = {
-                'name': 'SIMULATION',
-                'submission retry delays': [1]
-            }
+            itask.platform = {'name': 'SIMULATION'}
             itask.summary['job_runner_name'] = 'SIMULATION'
             itask.summary[self.KEY_EXECUTE_TIME_LIMIT] = (
                 itask.tdef.rtconfig['job']['simulated run length']