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Synapse 1.41.0 (2021-08-24)
===========================

This release adds support for Debian 12 (Bookworm), but **removes support for Ubuntu 20.10 (Groovy Gorilla)**, which reached End of Life last month.

Note that when using workers the `/_synapse/admin/v1/users/{userId}/media` must now be handled by media workers. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information.

Features
--------

- Enable room capabilities ([MSC3244](matrix-org/matrix-spec-proposals#3244)) by default and set room version 8 as the preferred room version when creating restricted rooms. ([\#10571](matrix-org/synapse#10571))

Synapse 1.41.0rc1 (2021-08-18)
==============================

Features
--------

- Add `get_userinfo_by_id` method to ModuleApi. ([\#9581](matrix-org/synapse#9581))
- Initial local support for [MSC3266](matrix-org/synapse#10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\#10394](matrix-org/synapse#10394))
- Experimental support for [MSC3288](matrix-org/matrix-spec-proposals#3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\#10435](matrix-org/synapse#10435))
- Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](matrix-org/synapse#10596)). ([\#10475](matrix-org/synapse#10475))
- Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](matrix-org/matrix-spec-proposals#2716)). ([\#10498](matrix-org/synapse#10498))
- Add a configuration setting for the time a `/sync` response is cached for. ([\#10513](matrix-org/synapse#10513))
- The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\#10518](matrix-org/synapse#10518))
- Add support for new redaction rules for historical events specified in [MSC2716](matrix-org/matrix-spec-proposals#2716). ([\#10538](matrix-org/synapse#10538))
- Add a setting to disable TLS when sending email. ([\#10546](matrix-org/synapse#10546))
- Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10549](matrix-org/synapse#10549), [\#10560](matrix-org/synapse#10560), [\#10569](matrix-org/synapse#10569), [\#10574](matrix-org/synapse#10574), [\#10575](matrix-org/synapse#10575), [\#10579](matrix-org/synapse#10579), [\#10583](matrix-org/synapse#10583))
- Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\#10558](matrix-org/synapse#10558), [\#10628](matrix-org/synapse#10628))
- Add support for routing `/createRoom` to workers. ([\#10564](matrix-org/synapse#10564))
- Update the Synapse Grafana dashboard. ([\#10570](matrix-org/synapse#10570))
- Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\#10578](matrix-org/synapse#10578))
- Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\#10598](matrix-org/synapse#10598))
- The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\#10602](matrix-org/synapse#10602))
- Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\#10638](matrix-org/synapse#10638))

Bugfixes
--------

- Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\#10129](matrix-org/synapse#10129))
- Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\#10532](matrix-org/synapse#10532))
- Fix exceptions in logs when failing to get remote room list. ([\#10541](matrix-org/synapse#10541))
- Fix longstanding bug which caused the user's presence "status message" to be reset when the user went offline. Contributed by @dklimpel. ([\#10550](matrix-org/synapse#10550))
- Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10580](matrix-org/synapse#10580))
- Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\#10592](matrix-org/synapse#10592))
- Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](matrix-org/matrix-spec-proposals#2285) enabled. Contributed by @SimonBrandner. ([\#10606](matrix-org/synapse#10606))
- Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\#10611](matrix-org/synapse#10611))
- Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\#10623](matrix-org/synapse#10623))

Improved Documentation
----------------------

- Add documentation for configuring a forward proxy. ([\#10443](matrix-org/synapse#10443))
- Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\#10551](matrix-org/synapse#10551))
- Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\#10599](matrix-org/synapse#10599))

Deprecations and Removals
-------------------------

- No longer build `.deb` packages for Ubuntu 20.10 Groovy Gorilla, which has now EOLed. ([\#10588](matrix-org/synapse#10588))
- The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](matrix-org/synapse#10596))

Internal Changes
----------------

- Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\#10119](matrix-org/synapse#10119))
- Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\#10504](matrix-org/synapse#10504))
- Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\#10507](matrix-org/synapse#10507))
- Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10527](matrix-org/synapse#10527), [\#10530](matrix-org/synapse#10530))
- Fix CI to not break when run against branches rather than pull requests. ([\#10529](matrix-org/synapse#10529))
- Mark all events stemming from the [MSC2716](matrix-org/matrix-spec-proposals#2716) `/batch_send` endpoint as historical. ([\#10537](matrix-org/synapse#10537))
- Clean up some of the federation event authentication code for clarity. ([\#10539](matrix-org/synapse#10539), [\#10591](matrix-org/synapse#10591))
- Convert `Transaction` and `Edu` objects to attrs. ([\#10542](matrix-org/synapse#10542))
- Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\#10552](matrix-org/synapse#10552))
- Update contributing.md to warn against rebasing an open PR. ([\#10563](matrix-org/synapse#10563))
- Remove the unused public rooms replication stream. ([\#10565](matrix-org/synapse#10565))
- Clarify error message when failing to join a restricted room. ([\#10572](matrix-org/synapse#10572))
- Remove references to BuildKite in favour of GitHub Actions. ([\#10573](matrix-org/synapse#10573))
- Move `/batch_send` endpoint defined by [MSC2716](matrix-org/matrix-spec-proposals#2716) to the `/v2_alpha` directory. ([\#10576](matrix-org/synapse#10576))
- Allow multiple custom directories in `read_templates`. ([\#10587](matrix-org/synapse#10587))
- Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\#10590](matrix-org/synapse#10590))
- Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\#10600](matrix-org/synapse#10600))
- Build Debian packages for Debian 12 (Bookworm). ([\#10612](matrix-org/synapse#10612))
- Fix up a couple of links to the database schema documentation. ([\#10620](matrix-org/synapse#10620))
- Fix a broken link to the upgrade notes. ([\#10631](matrix-org/synapse#10631))
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13 changes: 0 additions & 13 deletions .buildkite/.env

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4 changes: 2 additions & 2 deletions .buildkite/postgres-config.yaml → .ci/postgres-config.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -3,15 +3,15 @@
# CI's Docker setup at the point where this file is considered.
server_name: "localhost:8800"

signing_key_path: ".buildkite/test.signing.key"
signing_key_path: ".ci/test.signing.key"

report_stats: false

database:
name: "psycopg2"
args:
user: postgres
host: postgres
host: localhost
password: postgres
database: synapse

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@
# We use "postgres" as a database because it's bound to exist and the "synapse" one
# doesn't exist yet.
db_conn = psycopg2.connect(
user="postgres", host="postgres", password="postgres", dbname="postgres"
user="postgres", host="localhost", password="postgres", dbname="postgres"
)
db_conn.autocommit = True
cur = db_conn.cursor()
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#!/usr/bin/env bash

# this script is run by buildkite in a plain `bionic` container; it installs the
# this script is run by GitHub Actions in a plain `bionic` container; it installs the
# minimal requirements for tox and hands over to the py3-old tox environment.

set -ex
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -20,22 +20,22 @@ pip install -e .
echo "--- Generate the signing key"

# Generate the server's signing key.
python -m synapse.app.homeserver --generate-keys -c .buildkite/sqlite-config.yaml
python -m synapse.app.homeserver --generate-keys -c .ci/sqlite-config.yaml

echo "--- Prepare test database"

# Make sure the SQLite3 database is using the latest schema and has no pending background update.
scripts-dev/update_database --database-config .buildkite/sqlite-config.yaml
scripts-dev/update_database --database-config .ci/sqlite-config.yaml

# Create the PostgreSQL database.
./.buildkite/scripts/postgres_exec.py "CREATE DATABASE synapse"
.ci/scripts/postgres_exec.py "CREATE DATABASE synapse"

echo "+++ Run synapse_port_db against test database"
coverage run scripts/synapse_port_db --sqlite-database .buildkite/test_db.db --postgres-config .buildkite/postgres-config.yaml
coverage run scripts/synapse_port_db --sqlite-database .ci/test_db.db --postgres-config .ci/postgres-config.yaml

# We should be able to run twice against the same database.
echo "+++ Run synapse_port_db a second time"
coverage run scripts/synapse_port_db --sqlite-database .buildkite/test_db.db --postgres-config .buildkite/postgres-config.yaml
coverage run scripts/synapse_port_db --sqlite-database .ci/test_db.db --postgres-config .ci/postgres-config.yaml

#####

Expand All @@ -44,14 +44,14 @@ coverage run scripts/synapse_port_db --sqlite-database .buildkite/test_db.db --p
echo "--- Prepare empty SQLite database"

# we do this by deleting the sqlite db, and then doing the same again.
rm .buildkite/test_db.db
rm .ci/test_db.db

scripts-dev/update_database --database-config .buildkite/sqlite-config.yaml
scripts-dev/update_database --database-config .ci/sqlite-config.yaml

# re-create the PostgreSQL database.
./.buildkite/scripts/postgres_exec.py \
.ci/scripts/postgres_exec.py \
"DROP DATABASE synapse" \
"CREATE DATABASE synapse"

echo "+++ Run synapse_port_db against empty database"
coverage run scripts/synapse_port_db --sqlite-database .buildkite/test_db.db --postgres-config .buildkite/postgres-config.yaml
coverage run scripts/synapse_port_db --sqlite-database .ci/test_db.db --postgres-config .ci/postgres-config.yaml
4 changes: 2 additions & 2 deletions .buildkite/sqlite-config.yaml → .ci/sqlite-config.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,14 @@
# schema and run background updates on it.
server_name: "localhost:8800"

signing_key_path: ".buildkite/test.signing.key"
signing_key_path: ".ci/test.signing.key"

report_stats: false

database:
name: "sqlite3"
args:
database: ".buildkite/test_db.db"
database: ".ci/test_db.db"

# Suppress the key server warning.
trusted_key_servers: []
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32 changes: 14 additions & 18 deletions .github/workflows/tests.yml
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Expand Up @@ -8,7 +8,7 @@ on:
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
cancel-in-progress: true

jobs:
lint:
runs-on: ubuntu-latest
Expand Down Expand Up @@ -38,20 +38,15 @@ jobs:
if: ${{ github.base_ref == 'develop' || contains(github.base_ref, 'release-') }}
runs-on: ubuntu-latest
steps:
# Note: This and the script can be simplified once we drop Buildkite. See:
# https://github.com/actions/checkout/issues/266#issuecomment-638346893
# https://github.com/actions/checkout/issues/416
- uses: actions/checkout@v2
with:
ref: ${{ github.event.pull_request.head.sha }}
fetch-depth: 0
- uses: actions/setup-python@v2
- run: pip install tox
- name: Patch Buildkite-specific test script
run: |
sed -i -e 's/\$BUILDKITE_PULL_REQUEST/${{ github.event.number }}/' \
scripts-dev/check-newsfragment
- run: scripts-dev/check-newsfragment
env:
PULL_REQUEST_NUMBER: ${{ github.event.number }}

lint-sdist:
runs-on: ubuntu-latest
Expand Down Expand Up @@ -144,7 +139,7 @@ jobs:
uses: docker://ubuntu:bionic # For old python and sqlite
with:
workdir: /github/workspace
entrypoint: .buildkite/scripts/test_old_deps.sh
entrypoint: .ci/scripts/test_old_deps.sh
env:
TRIAL_FLAGS: "--jobs=2"
- name: Dump logs
Expand Down Expand Up @@ -197,12 +192,12 @@ jobs:
volumes:
- ${{ github.workspace }}:/src
env:
BUILDKITE_BRANCH: ${{ github.head_ref }}
POSTGRES: ${{ matrix.postgres && 1}}
MULTI_POSTGRES: ${{ (matrix.postgres == 'multi-postgres') && 1}}
WORKERS: ${{ matrix.workers && 1 }}
REDIS: ${{ matrix.redis && 1 }}
BLACKLIST: ${{ matrix.workers && 'synapse-blacklist-with-workers' }}
TOP: ${{ github.workspace }}

strategy:
fail-fast: false
Expand Down Expand Up @@ -232,7 +227,7 @@ jobs:
steps:
- uses: actions/checkout@v2
- name: Prepare test blacklist
run: cat sytest-blacklist .buildkite/worker-blacklist > synapse-blacklist-with-workers
run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
- name: Run SyTest
run: /bootstrap.sh synapse
working-directory: /src
Expand All @@ -252,6 +247,8 @@ jobs:
if: ${{ !failure() && !cancelled() }} # Allow previous steps to be skipped, but not fail
needs: linting-done
runs-on: ubuntu-latest
env:
TOP: ${{ github.workspace }}
strategy:
matrix:
include:
Expand Down Expand Up @@ -281,13 +278,7 @@ jobs:
- uses: actions/setup-python@v2
with:
python-version: ${{ matrix.python-version }}
- name: Patch Buildkite-specific test scripts
run: |
sed -i -e 's/host="postgres"/host="localhost"/' .buildkite/scripts/postgres_exec.py
sed -i -e 's/host: postgres/host: localhost/' .buildkite/postgres-config.yaml
sed -i -e 's|/src/||' .buildkite/{sqlite,postgres}-config.yaml
sed -i -e 's/\$TOP/\$GITHUB_WORKSPACE/' .coveragerc
- run: .buildkite/scripts/test_synapse_port_db.sh
- run: .ci/scripts/test_synapse_port_db.sh

complement:
if: ${{ !failure() && !cancelled() }}
Expand Down Expand Up @@ -374,6 +365,11 @@ jobs:
rc=0
results=$(jq -r 'to_entries[] | [.key,.value.result] | join(" ")' <<< $NEEDS_CONTEXT)
while read job result ; do
# The newsfile lint may be skipped on non PR builds
if [ $result == "skipped" ] && [ $job == "lint-newsfile" ]; then
continue
fi
if [ "$result" != "success" ]; then
echo "::set-failed ::Job $job returned $result"
rc=1
Expand Down
93 changes: 93 additions & 0 deletions CHANGES.md
Original file line number Diff line number Diff line change
@@ -1,3 +1,96 @@
Synapse 1.41.0 (2021-08-24)
===========================

This release adds support for Debian 12 (Bookworm), but **removes support for Ubuntu 20.10 (Groovy Gorilla)**, which reached End of Life last month.

Note that when using workers the `/_synapse/admin/v1/users/{userId}/media` must now be handled by media workers. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information.


Features
--------

- Enable room capabilities ([MSC3244](https://github.com/matrix-org/matrix-doc/pull/3244)) by default and set room version 8 as the preferred room version when creating restricted rooms. ([\#10571](https://github.com/matrix-org/synapse/issues/10571))


Synapse 1.41.0rc1 (2021-08-18)
==============================

Features
--------

- Add `get_userinfo_by_id` method to ModuleApi. ([\#9581](https://github.com/matrix-org/synapse/issues/9581))
- Initial local support for [MSC3266](https://github.com/matrix-org/synapse/pull/10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\#10394](https://github.com/matrix-org/synapse/issues/10394))
- Experimental support for [MSC3288](https://github.com/matrix-org/matrix-doc/pull/3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\#10435](https://github.com/matrix-org/synapse/issues/10435))
- Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](https://github.com/matrix-org/synapse/issues/10596)). ([\#10475](https://github.com/matrix-org/synapse/issues/10475))
- Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716)). ([\#10498](https://github.com/matrix-org/synapse/issues/10498))
- Add a configuration setting for the time a `/sync` response is cached for. ([\#10513](https://github.com/matrix-org/synapse/issues/10513))
- The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\#10518](https://github.com/matrix-org/synapse/issues/10518))
- Add support for new redaction rules for historical events specified in [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716). ([\#10538](https://github.com/matrix-org/synapse/issues/10538))
- Add a setting to disable TLS when sending email. ([\#10546](https://github.com/matrix-org/synapse/issues/10546))
- Add pagination to the spaces summary based on updates to [MSC2946](https://github.com/matrix-org/matrix-doc/pull/2946). ([\#10549](https://github.com/matrix-org/synapse/issues/10549), [\#10560](https://github.com/matrix-org/synapse/issues/10560), [\#10569](https://github.com/matrix-org/synapse/issues/10569), [\#10574](https://github.com/matrix-org/synapse/issues/10574), [\#10575](https://github.com/matrix-org/synapse/issues/10575), [\#10579](https://github.com/matrix-org/synapse/issues/10579), [\#10583](https://github.com/matrix-org/synapse/issues/10583))
- Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\#10558](https://github.com/matrix-org/synapse/issues/10558), [\#10628](https://github.com/matrix-org/synapse/issues/10628))
- Add support for routing `/createRoom` to workers. ([\#10564](https://github.com/matrix-org/synapse/issues/10564))
- Update the Synapse Grafana dashboard. ([\#10570](https://github.com/matrix-org/synapse/issues/10570))
- Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\#10578](https://github.com/matrix-org/synapse/issues/10578))
- Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\#10598](https://github.com/matrix-org/synapse/issues/10598))
- The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\#10602](https://github.com/matrix-org/synapse/issues/10602))
- Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\#10638](https://github.com/matrix-org/synapse/issues/10638))


Bugfixes
--------

- Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\#10129](https://github.com/matrix-org/synapse/issues/10129))
- Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\#10532](https://github.com/matrix-org/synapse/issues/10532))
- Fix exceptions in logs when failing to get remote room list. ([\#10541](https://github.com/matrix-org/synapse/issues/10541))
- Fix longstanding bug which caused the user's presence "status message" to be reset when the user went offline. Contributed by @dklimpel. ([\#10550](https://github.com/matrix-org/synapse/issues/10550))
- Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](https://github.com/matrix-org/matrix-doc/pull/2946). ([\#10580](https://github.com/matrix-org/synapse/issues/10580))
- Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\#10592](https://github.com/matrix-org/synapse/issues/10592))
- Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](https://github.com/matrix-org/matrix-doc/pull/2285) enabled. Contributed by @SimonBrandner. ([\#10606](https://github.com/matrix-org/synapse/issues/10606))
- Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\#10611](https://github.com/matrix-org/synapse/issues/10611))
- Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\#10623](https://github.com/matrix-org/synapse/issues/10623))


Improved Documentation
----------------------

- Add documentation for configuring a forward proxy. ([\#10443](https://github.com/matrix-org/synapse/issues/10443))
- Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\#10551](https://github.com/matrix-org/synapse/issues/10551))
- Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\#10599](https://github.com/matrix-org/synapse/issues/10599))


Deprecations and Removals
-------------------------

- No longer build `.deb` packages for Ubuntu 20.10 Groovy Gorilla, which has now EOLed. ([\#10588](https://github.com/matrix-org/synapse/issues/10588))
- The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](https://github.com/matrix-org/synapse/issues/10596))


Internal Changes
----------------

- Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\#10119](https://github.com/matrix-org/synapse/issues/10119))
- Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\#10504](https://github.com/matrix-org/synapse/issues/10504))
- Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\#10507](https://github.com/matrix-org/synapse/issues/10507))
- Add pagination to the spaces summary based on updates to [MSC2946](https://github.com/matrix-org/matrix-doc/pull/2946). ([\#10527](https://github.com/matrix-org/synapse/issues/10527), [\#10530](https://github.com/matrix-org/synapse/issues/10530))
- Fix CI to not break when run against branches rather than pull requests. ([\#10529](https://github.com/matrix-org/synapse/issues/10529))
- Mark all events stemming from the [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716) `/batch_send` endpoint as historical. ([\#10537](https://github.com/matrix-org/synapse/issues/10537))
- Clean up some of the federation event authentication code for clarity. ([\#10539](https://github.com/matrix-org/synapse/issues/10539), [\#10591](https://github.com/matrix-org/synapse/issues/10591))
- Convert `Transaction` and `Edu` objects to attrs. ([\#10542](https://github.com/matrix-org/synapse/issues/10542))
- Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\#10552](https://github.com/matrix-org/synapse/issues/10552))
- Update contributing.md to warn against rebasing an open PR. ([\#10563](https://github.com/matrix-org/synapse/issues/10563))
- Remove the unused public rooms replication stream. ([\#10565](https://github.com/matrix-org/synapse/issues/10565))
- Clarify error message when failing to join a restricted room. ([\#10572](https://github.com/matrix-org/synapse/issues/10572))
- Remove references to BuildKite in favour of GitHub Actions. ([\#10573](https://github.com/matrix-org/synapse/issues/10573))
- Move `/batch_send` endpoint defined by [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716) to the `/v2_alpha` directory. ([\#10576](https://github.com/matrix-org/synapse/issues/10576))
- Allow multiple custom directories in `read_templates`. ([\#10587](https://github.com/matrix-org/synapse/issues/10587))
- Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\#10590](https://github.com/matrix-org/synapse/issues/10590))
- Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\#10600](https://github.com/matrix-org/synapse/issues/10600))
- Build Debian packages for Debian 12 (Bookworm). ([\#10612](https://github.com/matrix-org/synapse/issues/10612))
- Fix up a couple of links to the database schema documentation. ([\#10620](https://github.com/matrix-org/synapse/issues/10620))
- Fix a broken link to the upgrade notes. ([\#10631](https://github.com/matrix-org/synapse/issues/10631))


Synapse 1.40.0 (2021-08-10)
===========================

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