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Remove code which updates application_services_state.last_txn #12680

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merged 3 commits into from
May 17, 2022

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@richvdh richvdh commented May 9, 2022

This column is unused as of #12209, so let's stop writing to it.

Fixes: #12352

@richvdh richvdh requested a review from a team as a code owner May 9, 2022 20:35
This column is unused as of #12209, so let's stop writing to it.
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Seems sensible, but there is a failing test

We need to look out for rows with null state now.
Comment on lines -455 to 466
def set_appservice_stream_type_pos_txn(txn: LoggingTransaction) -> None:
stream_id_type = "%s_stream_id" % stream_type
txn.execute(
"UPDATE application_services_state SET %s = ? WHERE as_id=?"
% stream_id_type,
(pos, service.id),
)

await self.db_pool.runInteraction(
"set_appservice_stream_type_pos", set_appservice_stream_type_pos_txn
# this may be the first time that we're recording any state for this AS, so
# we don't yet know if a row for it exists; hence we have to upsert here.
await self.db_pool.simple_upsert(
table="application_services_state",
keyvalues={"as_id": service.id},
values={f"{stream_type}_stream_id": pos},
# no need to lock when emulating upsert: as_id is a unique key
lock=False,
desc="set_appservice_stream_type_pos",
)
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I think this is actually fixing a previously-existing race. Since the row for service.id wasn't added until the transaction was successfully sent - which happened asynchronously, if at all - there was no guarantee that such a row actually existed at this point.

Of course, removing the code to add the row when the txn was sent meant that the row never got added at all, so the race became a consistent failure.

TL;DR: I assert this should have been an upsert all along.

Comment on lines +220 to +228
result = await self.db_pool.simple_select_one_onecol(
"application_services_state",
{"as_id": service.id},
["state"],
retcol="state",
allow_none=True,
desc="get_appservice_state",
)
if result:
return ApplicationServiceState(result.get("state"))
return ApplicationServiceState(result)
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this changes things so that if there is a row for the AS but it has state IS NULL, we return None rather than raising an exception.

And I think this is necessary because fixing the race in set_appservice_stream_type_pos now means that we hit this code at a point where we have a row with {stream_type}_stream_id but not yet a state. Previously, there would have (incorrectly) been no row at all.

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this changes things so that if there is a row for the AS but it has state IS NULL, we return None rather than raising an exception.

It took me a second to understand that ApplicationServiceState is a enum, and so raises if given a None.

We appear to have changed this behaviour #11488, and previously we returned None if state was None.

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There's a merge conflict which needs resolving.

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richvdh commented May 11, 2022

oops. thanks, fixed.

@richvdh richvdh requested review from DMRobertson and a team May 11, 2022 19:41
Comment on lines +220 to +228
result = await self.db_pool.simple_select_one_onecol(
"application_services_state",
{"as_id": service.id},
["state"],
retcol="state",
allow_none=True,
desc="get_appservice_state",
)
if result:
return ApplicationServiceState(result.get("state"))
return ApplicationServiceState(result)
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this changes things so that if there is a row for the AS but it has state IS NULL, we return None rather than raising an exception.

It took me a second to understand that ApplicationServiceState is a enum, and so raises if given a None.

We appear to have changed this behaviour #11488, and previously we returned None if state was None.

@richvdh richvdh merged commit 24b590d into develop May 17, 2022
@richvdh richvdh deleted the rav/no_update_last_txn branch May 17, 2022 10:07
squahtx pushed a commit that referenced this pull request May 24, 2022
Synapse 1.60.0rc1 (2022-05-24)
==============================

This release of Synapse adds a unique index to the `state_group_edges` table, in
order to prevent accidentally introducing duplicate information (for example,
because a database backup was restored multiple times). If your Synapse database
already has duplicate rows in this table, this could fail with an error and
require manual remediation.

Additionally, the signature of the `check_event_for_spam` module callback has changed.
The previous signature has been deprecated and remains working for now. Module authors
should update their modules to use the new signature where possible.

See [the upgrade notes](https://github.com/matrix-org/synapse/blob/develop/docs/upgrade.md#upgrading-to-v1600)
for more details.

Features
--------

- Measure the time taken in spam-checking callbacks and expose those measurements as metrics. ([\#12513](#12513))
- Add a `default_power_level_content_override` config option to set default room power levels per room preset. ([\#12618](#12618))
- Add support for [MSC3787: Allowing knocks to restricted rooms](matrix-org/matrix-spec-proposals#3787). ([\#12623](#12623))
- Send `USER_IP` commands on a different Redis channel, in order to reduce traffic to workers that do not process these commands. ([\#12672](#12672), [\#12809](#12809))
- Synapse will now reload [cache config](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#caching) when it receives a [SIGHUP](https://en.wikipedia.org/wiki/SIGHUP) signal. ([\#12673](#12673))
- Add a config options to allow for auto-tuning of caches. ([\#12701](#12701))
- Update [MSC2716](matrix-org/matrix-spec-proposals#2716) implementation to process marker events from the current state to avoid markers being lost in timeline gaps for federated servers which would cause the imported history to be undiscovered. ([\#12718](#12718))
- Add a `drop_federated_event` callback to `SpamChecker` to disregard inbound federated events before they take up much processing power, in an emergency. ([\#12744](#12744))
- Implement [MSC3818: Copy room type on upgrade](matrix-org/matrix-spec-proposals#3818). ([\#12786](#12786), [\#12792](#12792))
- Update to the `check_event_for_spam` module callback. Deprecate the current callback signature, replace it with a new signature that is both less ambiguous (replacing booleans with explicit allow/block) and more powerful (ability to return explicit error codes). ([\#12808](#12808))

Bugfixes
--------

- Fix a bug introduced in Synapse 1.7.0 that would prevent events from being sent to clients if there's a retention policy in the room when the support for retention policies is disabled. ([\#12611](#12611))
- Fix a bug introduced in Synapse 1.57.0 where `/messages` would throw a 500 error when querying for a non-existent room. ([\#12683](#12683))
- Add a unique index to `state_group_edges` to prevent duplicates being accidentally introduced and the consequential impact to performance. ([\#12687](#12687))
- Fix a long-standing bug where an empty room would be created when a user with an insufficient power level tried to upgrade a room. ([\#12696](#12696))
- Fix a bug introduced in Synapse 1.30.0 where empty rooms could be automatically created if a monthly active users limit is set. ([\#12713](#12713))
- Fix push to dismiss notifications when read on another client. Contributed by @SpiritCroc @ Beeper. ([\#12721](#12721))
- Fix poor database performance when reading the cache invalidation stream for large servers with lots of workers. ([\#12747](#12747))
- Delete events from the `federation_inbound_events_staging` table when a room is purged through the admin API. ([\#12770](#12770))
- Give a meaningful error message when a client tries to create a room with an invalid alias localpart. ([\#12779](#12779))
- Fix a bug introduced in 1.43.0 where a file (`providers.json`) was never closed. Contributed by @arkamar. ([\#12794](#12794))
- Fix a long-standing bug where finished log contexts would be re-started when failing to contact remote homeservers. ([\#12803](#12803))
- Fix a bug, introduced in Synapse 1.21.0, that led to media thumbnails being unusable before the index has been added in the background. ([\#12823](#12823))

Updates to the Docker image
---------------------------

- Fix the docker file after a dependency update. ([\#12853](#12853))

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

- Fix a typo in the Media Admin API documentation. ([\#12715](#12715))
- Update the OpenID Connect example for Keycloak to be compatible with newer versions of Keycloak. Contributed by @nhh. ([\#12727](#12727))
- Fix typo in server listener documentation. ([\#12742](#12742))
- Link to the configuration manual from the welcome page of the documentation. ([\#12748](#12748))
- Fix typo in `run_background_tasks_on` option name in configuration manual documentation. ([\#12749](#12749))
- Add information regarding the `rc_invites` ratelimiting option to the configuration docs. ([\#12759](#12759))
- Add documentation for cancellation of request processing. ([\#12761](#12761))
- Recommend using docker to run tests against postgres. ([\#12765](#12765))
- Add missing user directory endpoint from the generic worker documentation. Contributed by @olmari. ([\#12773](#12773))
- Add additional info to documentation of config option `cache_autotuning`. ([\#12776](#12776))
- Update configuration manual documentation to document size-related suffixes. ([\#12777](#12777))
- Fix invalid YAML syntax in the example documentation for the `url_preview_accept_language` config option. ([\#12785](#12785))

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

- Require a body in POST requests to `/rooms/{roomId}/receipt/{receiptType}/{eventId}`, as required by the [Matrix specification](https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3roomsroomidreceiptreceipttypeeventid). This breaks compatibility with Element Android 1.2.0 and earlier: users of those clients will be unable to send read receipts. ([\#12709](#12709))

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

- Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\#10533](#10533))
- Preparation for faster-room-join work: return subsets of room state which we already have, immediately. ([\#12498](#12498))
- Add `@cancellable` decorator, for use on endpoint methods that can be cancelled when clients disconnect. ([\#12586](#12586), [\#12588](#12588), [\#12630](#12630), [\#12694](#12694), [\#12698](#12698), [\#12699](#12699), [\#12700](#12700), [\#12705](#12705))
- Enable cancellation of `GET /rooms/$room_id/members`, `GET /rooms/$room_id/state` and `GET /rooms/$room_id/state/$event_type/*` requests. ([\#12708](#12708))
- Improve documentation of the `synapse.push` module. ([\#12676](#12676))
- Refactor functions to on `PushRuleEvaluatorForEvent`. ([\#12677](#12677))
- Preparation for database schema simplifications: stop writing to `event_reference_hashes`. ([\#12679](#12679))
- Remove code which updates unused database column `application_services_state.last_txn`. ([\#12680](#12680))
- Refactor `EventContext` class. ([\#12689](#12689))
- Remove an unneeded class in the push code. ([\#12691](#12691))
- Consolidate parsing of relation information from events. ([\#12693](#12693))
- Convert namespace class `Codes` into a string enum. ([\#12703](#12703))
- Optimize private read receipt filtering. ([\#12711](#12711))
- Drop the logging level of status messages for the URL preview cache expiry job from INFO to DEBUG. ([\#12720](#12720))
- Downgrade some OIDC errors to warnings in the logs, to reduce the noise of Sentry reports. ([\#12723](#12723))
- Update configs used by Complement to allow more invites/3PID validations during tests. ([\#12731](#12731))
- Fix a long-standing bug where the user directory background process would fail to make forward progress if a user included a null codepoint in their display name or avatar. ([\#12762](#12762))
- Tweak the mypy plugin so that `@cached` can accept `on_invalidate=None`. ([\#12769](#12769))
- Move methods that call `add_push_rule` to the `PushRuleStore` class. ([\#12772](#12772))
- Make handling of federation Authorization header (more) compliant with RFC7230. ([\#12774](#12774))
- Refactor `resolve_state_groups_for_events` to not pull out full state when no state resolution happens. ([\#12775](#12775))
- Do not keep going if there are 5 back-to-back background update failures. ([\#12781](#12781))
- Fix federation when using the demo scripts. ([\#12783](#12783))
- The `hash_password` script now fails when it is called without specifying a config file. Contributed by @jae1911. ([\#12789](#12789))
- Improve and fix type hints. ([\#12567](#12567), [\#12477](#12477), [\#12717](#12717), [\#12753](#12753), [\#12695](#12695), [\#12734](#12734), [\#12716](#12716), [\#12726](#12726), [\#12790](#12790), [\#12833](#12833))
- Update EventContext `get_current_event_ids` and `get_prev_event_ids` to accept state filters and update calls where possible. ([\#12791](#12791))
- Remove Caddy from the Synapse workers image used in Complement. ([\#12818](#12818))
- Add Complement's shared registration secret to the Complement worker image. This fixes tests that depend on it. ([\#12819](#12819))
- Support registering Application Services when running with workers under Complement. ([\#12826](#12826))
- Disable 'faster room join' Complement tests when testing against Synapse with workers. ([\#12842](#12842))
Danieloni1 added a commit to globekeeper/synapse that referenced this pull request Jun 8, 2022
Synapse 1.60.0 (2022-05-31)
===========================

This release of Synapse adds a unique index to the `state_group_edges` table, in
order to prevent accidentally introducing duplicate information (for example,
because a database backup was restored multiple times). If your Synapse database
already has duplicate rows in this table, this could fail with an error and
require manual remediation.

Additionally, the signature of the `check_event_for_spam` module callback has changed.
The previous signature has been deprecated and remains working for now. Module authors
should update their modules to use the new signature where possible.

See [the upgrade notes](https://github.com/matrix-org/synapse/blob/develop/docs/upgrade.md#upgrading-to-v1600)
for more details.

Bugfixes
--------

- Fix a bug introduced in Synapse 1.60.0rc1 that would break some imports from `synapse.module_api`. ([\matrix-org#12918](matrix-org#12918))

Synapse 1.60.0rc2 (2022-05-27)
==============================

Features
--------

- Add an option allowing users to use their password to reauthenticate for privileged actions even though password login is disabled. ([\matrix-org#12883](matrix-org#12883))

Bugfixes
--------

- Explicitly close `ijson` coroutines once we are done with them, instead of leaving the garbage collector to close them. ([\matrix-org#12875](matrix-org#12875))

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

- Improve URL previews by not including the content of media tags in the generated description. ([\matrix-org#12887](matrix-org#12887))

Synapse 1.60.0rc1 (2022-05-24)
==============================

Features
--------

- Measure the time taken in spam-checking callbacks and expose those measurements as metrics. ([\matrix-org#12513](matrix-org#12513))
- Add a `default_power_level_content_override` config option to set default room power levels per room preset. ([\matrix-org#12618](matrix-org#12618))
- Add support for [MSC3787: Allowing knocks to restricted rooms](matrix-org/matrix-spec-proposals#3787). ([\matrix-org#12623](matrix-org#12623))
- Send `USER_IP` commands on a different Redis channel, in order to reduce traffic to workers that do not process these commands. ([\matrix-org#12672](matrix-org#12672), [\matrix-org#12809](matrix-org#12809))
- Synapse will now reload [cache config](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#caching) when it receives a [SIGHUP](https://en.wikipedia.org/wiki/SIGHUP) signal. ([\matrix-org#12673](matrix-org#12673))
- Add a config options to allow for auto-tuning of caches. ([\matrix-org#12701](matrix-org#12701))
- Update [MSC2716](matrix-org/matrix-spec-proposals#2716) implementation to process marker events from the current state to avoid markers being lost in timeline gaps for federated servers which would cause the imported history to be undiscovered. ([\matrix-org#12718](matrix-org#12718))
- Add a `drop_federated_event` callback to `SpamChecker` to disregard inbound federated events before they take up much processing power, in an emergency. ([\matrix-org#12744](matrix-org#12744))
- Implement [MSC3818: Copy room type on upgrade](matrix-org/matrix-spec-proposals#3818). ([\matrix-org#12786](matrix-org#12786), [\matrix-org#12792](matrix-org#12792))
- Update to the `check_event_for_spam` module callback. Deprecate the current callback signature, replace it with a new signature that is both less ambiguous (replacing booleans with explicit allow/block) and more powerful (ability to return explicit error codes). ([\matrix-org#12808](matrix-org#12808))

Bugfixes
--------

- Fix a bug introduced in Synapse 1.7.0 that would prevent events from being sent to clients if there's a retention policy in the room when the support for retention policies is disabled. ([\matrix-org#12611](matrix-org#12611))
- Fix a bug introduced in Synapse 1.57.0 where `/messages` would throw a 500 error when querying for a non-existent room. ([\matrix-org#12683](matrix-org#12683))
- Add a unique index to `state_group_edges` to prevent duplicates being accidentally introduced and the consequential impact to performance. ([\matrix-org#12687](matrix-org#12687))
- Fix a long-standing bug where an empty room would be created when a user with an insufficient power level tried to upgrade a room. ([\matrix-org#12696](matrix-org#12696))
- Fix a bug introduced in Synapse 1.30.0 where empty rooms could be automatically created if a monthly active users limit is set. ([\matrix-org#12713](matrix-org#12713))
- Fix push to dismiss notifications when read on another client. Contributed by @SpiritCroc @ Beeper. ([\matrix-org#12721](matrix-org#12721))
- Fix poor database performance when reading the cache invalidation stream for large servers with lots of workers. ([\matrix-org#12747](matrix-org#12747))
- Delete events from the `federation_inbound_events_staging` table when a room is purged through the admin API. ([\matrix-org#12770](matrix-org#12770))
- Give a meaningful error message when a client tries to create a room with an invalid alias localpart. ([\matrix-org#12779](matrix-org#12779))
- Fix a bug introduced in 1.43.0 where a file (`providers.json`) was never closed. Contributed by @arkamar. ([\matrix-org#12794](matrix-org#12794))
- Fix a long-standing bug where finished log contexts would be re-started when failing to contact remote homeservers. ([\matrix-org#12803](matrix-org#12803))
- Fix a bug, introduced in Synapse 1.21.0, that led to media thumbnails being unusable before the index has been added in the background. ([\matrix-org#12823](matrix-org#12823))

Updates to the Docker image
---------------------------

- Fix the docker file after a dependency update. ([\matrix-org#12853](matrix-org#12853))

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

- Fix a typo in the Media Admin API documentation. ([\matrix-org#12715](matrix-org#12715))
- Update the OpenID Connect example for Keycloak to be compatible with newer versions of Keycloak. Contributed by @nhh. ([\matrix-org#12727](matrix-org#12727))
- Fix typo in server listener documentation. ([\matrix-org#12742](matrix-org#12742))
- Link to the configuration manual from the welcome page of the documentation. ([\matrix-org#12748](matrix-org#12748))
- Fix typo in `run_background_tasks_on` option name in configuration manual documentation. ([\matrix-org#12749](matrix-org#12749))
- Add information regarding the `rc_invites` ratelimiting option to the configuration docs. ([\matrix-org#12759](matrix-org#12759))
- Add documentation for cancellation of request processing. ([\matrix-org#12761](matrix-org#12761))
- Recommend using docker to run tests against postgres. ([\matrix-org#12765](matrix-org#12765))
- Add missing user directory endpoint from the generic worker documentation. Contributed by @olmari. ([\matrix-org#12773](matrix-org#12773))
- Add additional info to documentation of config option `cache_autotuning`. ([\matrix-org#12776](matrix-org#12776))
- Update configuration manual documentation to document size-related suffixes. ([\matrix-org#12777](matrix-org#12777))
- Fix invalid YAML syntax in the example documentation for the `url_preview_accept_language` config option. ([\matrix-org#12785](matrix-org#12785))

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

- Require a body in POST requests to `/rooms/{roomId}/receipt/{receiptType}/{eventId}`, as required by the [Matrix specification](https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3roomsroomidreceiptreceipttypeeventid). This breaks compatibility with Element Android 1.2.0 and earlier: users of those clients will be unable to send read receipts. ([\matrix-org#12709](matrix-org#12709))

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

- Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\matrix-org#10533](matrix-org#10533))
- Preparation for faster-room-join work: return subsets of room state which we already have, immediately. ([\matrix-org#12498](matrix-org#12498))
- Add `@cancellable` decorator, for use on endpoint methods that can be cancelled when clients disconnect. ([\matrix-org#12586](matrix-org#12586), [\matrix-org#12588](matrix-org#12588), [\matrix-org#12630](matrix-org#12630), [\matrix-org#12694](matrix-org#12694), [\matrix-org#12698](matrix-org#12698), [\matrix-org#12699](matrix-org#12699), [\matrix-org#12700](matrix-org#12700), [\matrix-org#12705](matrix-org#12705))
- Enable cancellation of `GET /rooms/$room_id/members`, `GET /rooms/$room_id/state` and `GET /rooms/$room_id/state/$event_type/*` requests. ([\matrix-org#12708](matrix-org#12708))
- Improve documentation of the `synapse.push` module. ([\matrix-org#12676](matrix-org#12676))
- Refactor functions to on `PushRuleEvaluatorForEvent`. ([\matrix-org#12677](matrix-org#12677))
- Preparation for database schema simplifications: stop writing to `event_reference_hashes`. ([\matrix-org#12679](matrix-org#12679))
- Remove code which updates unused database column `application_services_state.last_txn`. ([\matrix-org#12680](matrix-org#12680))
- Refactor `EventContext` class. ([\matrix-org#12689](matrix-org#12689))
- Remove an unneeded class in the push code. ([\matrix-org#12691](matrix-org#12691))
- Consolidate parsing of relation information from events. ([\matrix-org#12693](matrix-org#12693))
- Convert namespace class `Codes` into a string enum. ([\matrix-org#12703](matrix-org#12703))
- Optimize private read receipt filtering. ([\matrix-org#12711](matrix-org#12711))
- Drop the logging level of status messages for the URL preview cache expiry job from INFO to DEBUG. ([\matrix-org#12720](matrix-org#12720))
- Downgrade some OIDC errors to warnings in the logs, to reduce the noise of Sentry reports. ([\matrix-org#12723](matrix-org#12723))
- Update configs used by Complement to allow more invites/3PID validations during tests. ([\matrix-org#12731](matrix-org#12731))
- Fix a long-standing bug where the user directory background process would fail to make forward progress if a user included a null codepoint in their display name or avatar. ([\matrix-org#12762](matrix-org#12762))
- Tweak the mypy plugin so that `@cached` can accept `on_invalidate=None`. ([\matrix-org#12769](matrix-org#12769))
- Move methods that call `add_push_rule` to the `PushRuleStore` class. ([\matrix-org#12772](matrix-org#12772))
- Make handling of federation Authorization header (more) compliant with RFC7230. ([\matrix-org#12774](matrix-org#12774))
- Refactor `resolve_state_groups_for_events` to not pull out full state when no state resolution happens. ([\matrix-org#12775](matrix-org#12775))
- Do not keep going if there are 5 back-to-back background update failures. ([\matrix-org#12781](matrix-org#12781))
- Fix federation when using the demo scripts. ([\matrix-org#12783](matrix-org#12783))
- The `hash_password` script now fails when it is called without specifying a config file. Contributed by @jae1911. ([\matrix-org#12789](matrix-org#12789))
- Improve and fix type hints. ([\matrix-org#12567](matrix-org#12567), [\matrix-org#12477](matrix-org#12477), [\matrix-org#12717](matrix-org#12717), [\matrix-org#12753](matrix-org#12753), [\matrix-org#12695](matrix-org#12695), [\matrix-org#12734](matrix-org#12734), [\matrix-org#12716](matrix-org#12716), [\matrix-org#12726](matrix-org#12726), [\matrix-org#12790](matrix-org#12790), [\matrix-org#12833](matrix-org#12833))
- Update EventContext `get_current_event_ids` and `get_prev_event_ids` to accept state filters and update calls where possible. ([\matrix-org#12791](matrix-org#12791))
- Remove Caddy from the Synapse workers image used in Complement. ([\matrix-org#12818](matrix-org#12818))
- Add Complement's shared registration secret to the Complement worker image. This fixes tests that depend on it. ([\matrix-org#12819](matrix-org#12819))
- Support registering Application Services when running with workers under Complement. ([\matrix-org#12826](matrix-org#12826))
- Disable 'faster room join' Complement tests when testing against Synapse with workers. ([\matrix-org#12842](matrix-org#12842))
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Remove code that updates application_services_state.last_txn
3 participants