Ensure that incoming to-device messages are not dropped #17127
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... when workers are unreachable, etc.
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bother |
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better now |
erikjohnston
approved these changes
Apr 29, 2024
yingziwu
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to yingziwu/synapse
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May 15, 2024
Synapse 1.107.0 (2024-05-14) ============================ No significant changes since 1.107.0rc1. - Add preliminary support for [MSC3823: Account Suspension](matrix-org/matrix-spec-proposals#3823). ([\#17051](element-hq/synapse#17051)) - Declare support for [Matrix v1.10](https://matrix.org/blog/2024/03/22/matrix-v1.10-release/). Contributed by @clokep. ([\#17082](element-hq/synapse#17082)) - Add support for [MSC4115: membership metadata on events](matrix-org/matrix-spec-proposals#4115). ([\#17104](element-hq/synapse#17104), [\#17137](element-hq/synapse#17137)) - Fixed search feature of Element Android on homesevers using SQLite by returning search terms as search highlights. ([\#17000](element-hq/synapse#17000)) - Fixes a bug introduced in v1.52.0 where the `destination` query parameter for the [Destination Rooms Admin API](https://element-hq.github.io/synapse/v1.105/usage/administration/admin_api/federation.html#destination-rooms) failed to actually filter returned rooms. ([\#17077](element-hq/synapse#17077)) - For MSC3266 room summaries, support queries at the recommended endpoint of `/_matrix/client/unstable/im.nheko.summary/summary/{roomIdOrAlias}`. The existing endpoint of `/_matrix/client/unstable/im.nheko.summary/rooms/{roomIdOrAlias}/summary` is deprecated. ([\#17078](element-hq/synapse#17078)) - Apply user email & picture during OIDC registration if present & selected. ([\#17120](element-hq/synapse#17120)) - Improve error message for cross signing reset with [MSC3861](matrix-org/matrix-spec-proposals#3861) enabled. ([\#17121](element-hq/synapse#17121)) - Fix a bug which meant that to-device messages received over federation could be dropped when the server was under load or networking problems caused problems between Synapse processes or the database. ([\#17127](element-hq/synapse#17127)) - Fix bug where `StreamChangeCache` would not respect configured cache factors. ([\#17152](element-hq/synapse#17152)) - Correct licensing metadata on Docker image. ([\#17141](element-hq/synapse#17141)) - Update the `event_cache_size` and `global_factor` configuration options' documentation. ([\#17071](element-hq/synapse#17071)) - Remove broken sphinx docs. ([\#17073](element-hq/synapse#17073), [\#17148](element-hq/synapse#17148)) - Add RuntimeDirectory to example matrix-synapse.service systemd unit. ([\#17084](element-hq/synapse#17084)) - Fix various small typos throughout the docs. ([\#17114](element-hq/synapse#17114)) - Update enable_notifs configuration documentation. ([\#17116](element-hq/synapse#17116)) - Update the Upgrade Notes with the latest minimum supported Rust version of 1.66.0. Contributed by @jahway603. ([\#17140](element-hq/synapse#17140)) - Enable [MSC3266](matrix-org/matrix-spec-proposals#3266) by default in the Synapse Complement image. ([\#17105](element-hq/synapse#17105)) - Add optimisation to `StreamChangeCache.get_entities_changed(..)`. ([\#17130](element-hq/synapse#17130)) * Bump furo from 2024.1.29 to 2024.4.27. ([\#17133](element-hq/synapse#17133)) * Bump idna from 3.6 to 3.7. ([\#17136](element-hq/synapse#17136)) * Bump jsonschema from 4.21.1 to 4.22.0. ([\#17157](element-hq/synapse#17157)) * Bump lxml from 5.1.0 to 5.2.1. ([\#17158](element-hq/synapse#17158)) * Bump phonenumbers from 8.13.29 to 8.13.35. ([\#17106](element-hq/synapse#17106)) - Bump pillow from 10.2.0 to 10.3.0. ([\#17146](element-hq/synapse#17146)) * Bump pydantic from 2.6.4 to 2.7.0. ([\#17107](element-hq/synapse#17107)) * Bump pydantic from 2.7.0 to 2.7.1. ([\#17160](element-hq/synapse#17160)) * Bump pyicu from 2.12 to 2.13. ([\#17109](element-hq/synapse#17109)) * Bump serde from 1.0.197 to 1.0.198. ([\#17111](element-hq/synapse#17111)) * Bump serde from 1.0.198 to 1.0.199. ([\#17132](element-hq/synapse#17132)) * Bump serde from 1.0.199 to 1.0.200. ([\#17161](element-hq/synapse#17161)) * Bump serde_json from 1.0.115 to 1.0.116. ([\#17112](element-hq/synapse#17112)) - Update `tornado` Python dependency from 6.2 to 6.4. ([\#17131](element-hq/synapse#17131)) * Bump twisted from 23.10.0 to 24.3.0. ([\#17135](element-hq/synapse#17135)) * Bump types-bleach from 6.1.0.1 to 6.1.0.20240331. ([\#17110](element-hq/synapse#17110)) * Bump types-pillow from 10.2.0.20240415 to 10.2.0.20240423. ([\#17159](element-hq/synapse#17159)) * Bump types-setuptools from 69.0.0.20240125 to 69.5.0.20240423. ([\#17134](element-hq/synapse#17134))
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... when workers are unreachable, etc.
Fixes #17117.
The general principle is just to make sure that we propagate any exceptions to the JsonResource, so that we return an error code to the sending server. That means that the sending server no longer considers the message safely sent, so it will retry later.
In the issue, Erik mentions that an alternative solution would be to persist the to-device messages into a table so that they can be retried. This might be an improvement for performance, but even if we did that, we still need this mechanism, since we might be unable to reach the database. So, if we want to do that, it can be a later follow-up.