Merge branch 'master' into develop

CHANGES.md

+Synapse 1.49.2 (2021-12-21)
+===========================
+
+This release fixes a regression introduced in Synapse 1.49.0 which could cause `/sync` requests to take significantly longer. This would particularly affect "initial" syncs for users participating in a large number of rooms, and in extreme cases, could make it impossible for such users to log in on a new client.
+
+**Note:** in line with our [deprecation policy](https://matrix-org.github.io/synapse/latest/deprecation_policy.html) for platform dependencies, this will be the last release to support Python 3.6 and PostgreSQL 9.6, both of which have now reached upstream end-of-life. Synapse will require Python 3.7+ and PostgreSQL 10+.
+
+**Note:** We will also stop producing packages for Ubuntu 18.04 (Bionic Beaver) after this release, as it uses Python 3.6.
+
+Bugfixes
+--------
+
+- Fix a performance regression in `/sync` handling, introduced in 1.49.0. ([\#11583](https://github.com/matrix-org/synapse/issues/11583))
+
+Internal Changes
+----------------
+
+- Work around a build problem on Debian Buster. ([\#11625](https://github.com/matrix-org/synapse/issues/11625))
+
+
+Synapse 1.49.1 (2021-12-21)
+===========================
+
+Not released due to problems building the debian packages.
+
+
 Synapse 1.49.0 (2021-12-14)
 ===========================

changelog.d/11583.bugfix

-Fix a performance regression in `/sync` handling, introduced in 1.49.0.

debian/changelog

+matrix-synapse-py3 (1.49.2) stable; urgency=medium
+
+  * New synapse release 1.49.2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 21 Dec 2021 17:31:03 +0000
+
+matrix-synapse-py3 (1.49.1) stable; urgency=medium
+
+  * New synapse release 1.49.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 21 Dec 2021 11:07:30 +0000
+
 matrix-synapse-py3 (1.49.0) stable; urgency=medium
 
   * New synapse release 1.49.0.

docs/deprecation_policy.md

@@ -14,8 +14,8 @@ i.e. when a version reaches End of Life Synapse will withdraw support for that
 version in future releases.
 
 Details on the upstream support life cycles for Python and PostgreSQL are
-documented at https://endoflife.date/python and
-https://endoflife.date/postgresql.
+documented at [https://endoflife.date/python](https://endoflife.date/python) and
+[https://endoflife.date/postgresql](https://endoflife.date/postgresql).
 
 
 Context

synapse/__init__.py

@@ -47,7 +47,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.49.0"
+__version__ = "1.49.2"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when

synapse/python_dependencies.py

@@ -50,7 +50,8 @@ logger = logging.getLogger(__name__)
 REQUIREMENTS = [
     # we use the TYPE_CHECKER.redefine method added in jsonschema 3.0.0
     "jsonschema>=3.0.0",
-    "frozendict>=1",
+    # frozendict 2.1.2 is broken on Debian 10: https://github.com/Marco-Sulla/python-frozendict/issues/41
+    "frozendict>=1,<2.1.2",
     "unpaddedbase64>=1.1.0",
     "canonicaljson>=1.4.0",
     # we use the type definitions added in signedjson 1.1.