diff options
Diffstat (limited to 'synapse/handlers/federation.py')
| -rw-r--r-- | synapse/handlers/federation.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 44e70c6c3c..5f7e0a1f79 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -45,6 +45,7 @@ from synapse.api.errors import ( Codes, FederationDeniedError, FederationError, + FederationPullAttemptBackoffError, HttpResponseException, LimitExceededError, NotFoundError, @@ -1720,7 +1721,22 @@ class FederationHandler: destination, event ) break + except FederationPullAttemptBackoffError as exc: + # Log a warning about why we failed to process the event (the error message + # for `FederationPullAttemptBackoffError` is pretty good) + logger.warning("_sync_partial_state_room: %s", exc) + # We do not record a failed pull attempt when we backoff fetching a missing + # `prev_event` because not being able to fetch the `prev_events` just means + # we won't be able to de-outlier the pulled event. But we can still use an + # `outlier` in the state/auth chain for another event. So we shouldn't stop + # a downstream event from trying to pull it. + # + # This avoids a cascade of backoff for all events in the DAG downstream from + # one event backoff upstream. except FederationError as e: + # TODO: We should `record_event_failed_pull_attempt` here, + # see https://github.com/matrix-org/synapse/issues/13700 + if attempt == len(destinations) - 1: # We have tried every remote server for this event. Give up. # TODO(faster_joins) giving up isn't the right thing to do |