Use errback pattern and catch async failures

1 files changed, 6 insertions, 1 deletions

diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py
index f0f89af7dc..16b897eb18 100644
--- a/synapse/handlers/appservice.py
+++ b/synapse/handlers/appservice.py
@@ -28,6 +28,7 @@ from synapse.metrics import (
     event_processing_loop_room_count,
 )
 from synapse.metrics.background_process_metrics import run_as_background_process
+from synapse.util import make_log_failure_errback
 from synapse.util.logcontext import make_deferred_yieldable, run_in_background
 from synapse.util.metrics import Measure
 
@@ -112,7 +113,11 @@ class ApplicationServicesHandler(object):
 
                         if not self.started_scheduler:
                             def start_scheduler():
-                                return self.scheduler.start().addErrback(log_failure)
+                                return self.scheduler.start().addErrback(
+                                    make_log_failure_errback(
+                                        "Application Services Failure",
+                                    )
+                                )
                             run_as_background_process("as_scheduler", start_scheduler)
                             self.started_scheduler = True