Synapse 1.30.0rc1 (2021-03-16)

Note that this release deprecates the ability for appservices to call POST /_matrix/client/r0/register without the body parameter type. Appservice developers should use a type value of m.login.application_service as per the spec. In future releases, calling this endpoint with an access token - but without a m.login.application_service type - will fail.

Features

• Add prometheus metrics for number of users successfully registering and logging in. (#9510, #9511, #9573)
• Add synapse_federation_last_sent_pdu_time and synapse_federation_last_received_pdu_time prometheus metrics, which monitor federation delays by reporting the timestamps of messages sent and received to a set of remote servers. (#9540)
• Add support for generating JSON Web Tokens dynamically for use as OIDC client secrets. (#9549)
• Optimise handling of incomplete room history for incoming federation. (#9601)
• Finalise support for allowing clients to pick an SSO Identity Provider (MSC2858). (#9617)
• Tell spam checker modules about the SSO IdP a user registered through if one was used. (#9626)

Bugfixes

• Fix long-standing bug when generating thumbnails for some images with transparency: TypeError: cannot unpack non-iterable int object. (#9473)
• Purge chain cover indexes for events that were purged prior to Synapse v1.29.0. (#9542, #9583)
• Fix bug where federation requests were not correctly retried on 5xx responses. (#9567)
• Fix re-activating an account via the admin API when local passwords are disabled. (#9587)
• Fix a bug introduced in Synapse 1.20 which caused incoming federation transactions to stack up, causing slow recovery from outages. (#9597)
• Fix a bug introduced in v1.28.0 where the OpenID Connect callback endpoint could error with a MacaroonInitException. (#9620)
• Fix Internal Server Error on GET /_synapse/client/saml2/authn_response request. (#9623)

Updates to the Docker image

• Use jemalloc if available in docker. (#8553)

Improved Documentation

• Add relayd entry to reverse proxy example configurations. (#9508)
• Improve the SAML2 upgrade notes for 1.27.0. (#9550)
• Link to the "List user's media" admin API from the media admin API docs. (#9571)
• Clarify the spam checker modules documentation example to mention that parse_config is a required method. (#9580)
• Clarify the sample configuration for stats settings. (#9604)

Deprecations and Removals

• The synapse_federation_last_sent_pdu_age and synapse_federation_last_received_pdu_age prometheus metrics have been removed. They are replaced by synapse_federation_last_sent_pdu_time and synapse_federation_last_received_pdu_time. (#9540)
• Registering an Application Service user without using the m.login.application_service login type will be unsupported in an upcoming Synapse release. (#9559)

Internal Changes

• Add tests to ResponseCache. (#9458)
• Add type hints to purge room and server notice admin API. (#9520)
• Add extra logging to ObservableDeferred when callbacks throw exceptions. (#9523)
• Fix incorrect type hints. (#9528, #9543, #9591, #9608, #9618)
• Add an additional test for purging a room. (#9541)
• Add a .git-blame-ignore-revs file with the hashes of auto-formatting. (#9560)
• Increase the threshold before which outbound federation to a server goes into "catch up" mode, which is expensive for the remote server to handle. (#9561)
• Fix spurious errors reported by the config-lint.sh script. (#9562)
• Fix type hints and tests for BlacklistingAgentWrapper and BlacklistingReactorWrapper. (#9563)
• Do not have mypy ignore type hints from unpaddedbase64. (#9568)
• Improve efficiency of calculating the auth chain in large rooms. (#9576)
• Convert synapse.types.Requester to an attrs class. (#9586)
• Add logging for redis connection setup. (#9590)
• Improve logging when processing incoming transactions. (#9596)
• Remove unused stats.retention setting, and emit a warning if stats are disabled. (#9604)
• Prevent attempting to bundle aggregations for state events in /context APIs. (#9619)