Build: handle SoftTimeLimitExceeded (#12481)

See
https://docs.celeryq.dev/en/stable/userguide/workers.html#time-limits

Closes #12480

Author: humitos

readthedocs/projects/tasks/builds.py

@@ -16,6 +16,7 @@
 
 import structlog
 from celery import Task
+from celery.exceptions import SoftTimeLimitExceeded
 from django.conf import settings
 from django.utils import timezone
 from slumber import API
@@ -484,6 +485,10 @@ def on_failure(self, exc, task_id, args, kwargs, einfo):
             if isinstance(exc, BuildCancelled):
                 self.data.build["state"] = BUILD_STATE_CANCELLED
 
+        elif isinstance(exc, SoftTimeLimitExceeded):
+            log.info("Soft time limit exceeded.")
+            message_id = BuildUserError.BUILD_TIME_OUT
+
         else:
             # We don't know what happened in the build. Log the exception and
             # report a generic notification to the user.