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Since Synapse 1.76.0, any module which registers a `on_new_event` callback would brick the ability to join remote rooms. This is because this callback tried to get the full state of the room, which would end up in a deadlock. Related: https://github.com/matrix-org/synapse-auto-accept-invite/issues/18 The following module would brick the ability to join remote rooms: ```python from typing import Any, Dict, Literal, Union import logging from synapse.module_api import ModuleApi, EventBase logger = logging.getLogger(__name__) class MyModule: def __init__(self, config: None, api: ModuleApi): self._api = api self._config = config self._api.register_third_party_rules_callbacks( on_new_event=self.on_new_event, ) async def on_new_event(self, event: EventBase, _state_map: Any) -> None: logger.info(f"Received new event: {event}") @staticmethod def parse_config(_config: Dict[str, Any]) -> None: return None ``` This is technically a breaking change, as we are now passing partial state on the `on_new_event` callback. However, this callback was broken for federated rooms since 1.76.0, and local rooms have full state anyway, so it's unlikely that it would change anything. |
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| .. | ||
| account_data_callbacks.md | ||
| account_validity_callbacks.md | ||
| add_extra_fields_to_client_events_unsigned.md | ||
| background_update_controller_callbacks.md | ||
| index.md | ||
| password_auth_provider_callbacks.md | ||
| porting_legacy_module.md | ||
| presence_router_callbacks.md | ||
| spam_checker_callbacks.md | ||
| third_party_rules_callbacks.md | ||
| writing_a_module.md | ||