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Fix exceptions when a connection is closed before we read the headers #3723
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Make the logcontext filter not explode if it somehow ends up with a logcontext of None, since that infinite-loops the whole logging system.
This fixes bugs introduced in #3700, by making sure that we behave sanely when an incoming connection is closed before the headers are read.
richvdh
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Aug 22, 2018
Features -------- - Add support for the SNI extension to federation TLS connections. Thanks to @vojeroen! ([\#3439](#3439)) - Add /_media/r0/config ([\#3184](#3184)) - speed up /members API and add `at` and `membership` params as per MSC1227 ([\#3568](#3568)) - implement `summary` block in /sync response as per MSC688 ([\#3574](#3574)) - Add lazy-loading support to /messages as per MSC1227 ([\#3589](#3589)) - Add ability to limit number of monthly active users on the server ([\#3633](#3633)) - Support more federation endpoints on workers ([\#3653](#3653)) - Basic support for room versioning ([\#3654](#3654)) - Ability to disable client/server Synapse via conf toggle ([\#3655](#3655)) - Ability to whitelist specific threepids against monthly active user limiting ([\#3662](#3662)) - Add some metrics for the appservice and federation event sending loops ([\#3664](#3664)) - Where server is disabled, block ability for locked out users to read new messages ([\#3670](#3670)) - set admin uri via config, to be used in error messages where the user should contact the administrator ([\#3687](#3687)) - Synapse's presence functionality can now be disabled with the "use_presence" configuration option. ([\#3694](#3694)) - For resource limit blocked users, prevent writing into rooms ([\#3708](#3708)) Bugfixes -------- - Fix occasional glitches in the synapse_event_persisted_position metric ([\#3658](#3658)) - Fix bug on deleting 3pid when using identity servers that don't support unbind API ([\#3661](#3661)) - Make the tests pass on Twisted < 18.7.0 ([\#3676](#3676)) - Don’t ship recaptcha_ajax.js, use it directly from Google ([\#3677](#3677)) - Fixes test_reap_monthly_active_users so it passes under postgres ([\#3681](#3681)) - Fix mau blocking calulation bug on login ([\#3689](#3689)) - Fix missing yield in synapse.storage.monthly_active_users.initialise_reserved_users ([\#3692](#3692)) - Improve HTTP request logging to include all requests ([\#3700](#3700)) - Avoid timing out requests while we are streaming back the response ([\#3701](#3701)) - Support more federation endpoints on workers ([\#3705](#3705), [\#3713](#3713)) - Fix "Starting db txn 'get_all_updated_receipts' from sentinel context" warning ([\#3710](#3710)) - Fix bug where `state_cache` cache factor ignored environment variables ([\#3719](#3719)) - Fix bug in v0.33.3rc1 which caused infinite loops and OOMs ([\#3723](#3723)) - Fix bug introduced in v0.33.3rc1 which made the ToS give a 500 error ([\#3732](#3732)) Deprecations and Removals ------------------------- - The Shared-Secret registration method of the legacy v1/register REST endpoint has been removed. For a replacement, please see [the admin/register API documentation](https://github.com/matrix-org/synapse/blob/master/docs/admin_api/register_api.rst). ([\#3703](#3703)) Internal Changes ---------------- - The test suite now can run under PostgreSQL. ([\#3423](#3423)) - Refactor HTTP replication endpoints to reduce code duplication ([\#3632](#3632)) - Tests now correctly execute on Python 3. ([\#3647](#3647)) - Sytests can now be run inside a Docker container. ([\#3660](#3660)) - Port over enough to Python 3 to allow the sytests to start. ([\#3668](#3668)) - Update docker base image from alpine 3.7 to 3.8. ([\#3669](#3669)) - Rename synapse.util.async to synapse.util.async_helpers to mitigate async becoming a keyword on Python 3.7. ([\#3678](#3678)) - Synapse's tests are now formatted with the black autoformatter. ([\#3679](#3679)) - Implemented a new testing base class to reduce test boilerplate. ([\#3684](#3684)) - Rename MAU prometheus metrics ([\#3690](#3690)) - add new error type ResourceLimit ([\#3707](#3707)) - Logcontexts for replication command handlers ([\#3709](#3709)) - Update admin register API documentation to reference a real user ID. ([\#3712](#3712))
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This fixes bugs introduced in #3700, by making sure that we behave sanely when an incoming connection is closed before the headers are read.
Also a robustness fix for the logcontext filter, to make it not explode so hideoously when we mess up elsewhere.