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Update worker docs to update preferred settings for pusher and federation_sender (#14493)
* Fix one typo on line 3700(and apparently do something to other lines, no idea) * Update config_documentation.md with more information about how federation_senders and pushers settings can be handled. Specifically, that the instance map style of config does not require the special other variables that enable and disable functionality and that a single worker CAN be added to the map not only just two or more. * Extra line here for consistency and appearance. * Add link to sygnal repo. * Add deprecation notice to workers.md and point to the newer alternative method of defining this functionality. * Changelog * Correct version number of Synapse the deprecation is happening in. * Update quiet deprecation with simple notice and suggestion.
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changelog.d/14493.doc
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changelog.d/14493.doc
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Update worker settings for `pusher` and `federation_sender` functionality.
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@ -858,7 +858,7 @@ which are older than the room's maximum retention period. Synapse will also
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filter events received over federation so that events that should have been
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purged are ignored and not stored again.
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The message retention policies feature is disabled by default. Please be advised
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The message retention policies feature is disabled by default. Please be advised
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that enabling this feature carries some risk. There are known bugs with the implementation
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which can cause database corruption. Setting retention to delete older history
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is less risky than deleting newer history but in general caution is advised when enabling this
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@ -3003,7 +3003,7 @@ Options for each entry include:
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which is set to the claims returned by the UserInfo Endpoint and/or
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in the ID Token.
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* `backchannel_logout_enabled`: set to `true` to process OIDC Back-Channel Logout notifications.
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* `backchannel_logout_enabled`: set to `true` to process OIDC Back-Channel Logout notifications.
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Those notifications are expected to be received on `/_synapse/client/oidc/backchannel_logout`.
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Defaults to `false`.
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@ -3425,7 +3425,7 @@ This option has the following sub-options:
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NB. If you set this to true, and the last time the user_directory search
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indexes were (re)built was before Synapse 1.44, you'll have to
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rebuild the indexes in order to search through all known users.
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These indexes are built the first time Synapse starts; admins can
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manually trigger a rebuild via the API following the instructions
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[for running background updates](../administration/admin_api/background_updates.md#run),
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@ -3684,7 +3684,7 @@ As a result, the worker configuration is divided into two parts.
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1. The first part (in this section of the manual) defines which shardable tasks
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are delegated to privileged workers. This allows unprivileged workers to make
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request a privileged worker to act on their behalf.
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requests to a privileged worker to act on their behalf.
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1. [The second part](#individual-worker-configuration)
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controls the behaviour of individual workers in isolation.
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@ -3696,7 +3696,7 @@ For guidance on setting up workers, see the [worker documentation](../../workers
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A shared secret used by the replication APIs on the main process to authenticate
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HTTP requests from workers.
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The default, this value is omitted (equivalently `null`), which means that
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The default, this value is omitted (equivalently `null`), which means that
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traffic between the workers and the main process is not authenticated.
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Example configuration:
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@ -3706,6 +3706,8 @@ worker_replication_secret: "secret_secret"
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---
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### `start_pushers`
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Unnecessary to set if using [`pusher_instances`](#pusher_instances) with [`generic_workers`](../../workers.md#synapseappgeneric_worker).
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Controls sending of push notifications on the main process. Set to `false`
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if using a [pusher worker](../../workers.md#synapseapppusher). Defaults to `true`.
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@ -3716,25 +3718,30 @@ start_pushers: false
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---
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### `pusher_instances`
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It is possible to run multiple [pusher workers](../../workers.md#synapseapppusher),
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in which case the work is balanced across them. Use this setting to list the pushers by
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[`worker_name`](#worker_name). Ensure the main process and all pusher workers are
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restarted after changing this option.
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It is possible to scale the processes that handle sending push notifications to [sygnal](https://github.com/matrix-org/sygnal)
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and email by running a [`generic_worker`](../../workers.md#synapseappgeneric_worker) and adding it's [`worker_name`](#worker_name) to
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a `pusher_instances` map. Doing so will remove handling of this function from the main
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process. Multiple workers can be added to this map, in which case the work is balanced
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across them. Ensure the main process and all pusher workers are restarted after changing
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this option.
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If no or only one pusher worker is configured, this setting is not necessary.
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The main process will send out push notifications by default if you do not disable
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it by setting [`start_pushers: false`](#start_pushers).
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Example configuration:
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Example configuration for a single worker:
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```yaml
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pusher_instances:
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- pusher_worker1
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```
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And for multiple workers:
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```yaml
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start_pushers: false
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pusher_instances:
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- pusher_worker1
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- pusher_worker2
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```
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---
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### `send_federation`
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Unnecessary to set if using [`federation_sender_instances`](#federation_sender_instances) with [`generic_workers`](../../workers.md#synapseappgeneric_worker).
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Controls sending of outbound federation transactions on the main process.
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Set to `false` if using a [federation sender worker](../../workers.md#synapseappfederation_sender).
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Defaults to `true`.
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@ -3746,29 +3753,36 @@ send_federation: false
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---
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### `federation_sender_instances`
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It is possible to run multiple
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[federation sender worker](../../workers.md#synapseappfederation_sender), in which
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case the work is balanced across them. Use this setting to list the senders.
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It is possible to scale the processes that handle sending outbound federation requests
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by running a [`generic_worker`](../../workers.md#synapseappgeneric_worker) and adding it's [`worker_name`](#worker_name) to
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a `federation_sender_instances` map. Doing so will remove handling of this function from
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the main process. Multiple workers can be added to this map, in which case the work is
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balanced across them.
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This configuration setting must be shared between all federation sender workers, and if
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changed all federation sender workers must be stopped at the same time and then
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started, to ensure that all instances are running with the same config (otherwise
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This configuration setting must be shared between all workers handling federation
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sending, and if changed all federation sender workers must be stopped at the same time
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and then started, to ensure that all instances are running with the same config (otherwise
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events may be dropped).
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Example configuration:
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Example configuration for a single worker:
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```yaml
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send_federation: false
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federation_sender_instances:
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- federation_sender1
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```
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And for multiple workers:
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```yaml
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federation_sender_instances:
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- federation_sender1
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- federation_sender2
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```
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---
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### `instance_map`
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When using workers this should be a map from [`worker_name`](#worker_name) to the
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HTTP replication listener of the worker, if configured.
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Each worker declared under [`stream_writers`](../../workers.md#stream-writers) needs
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Each worker declared under [`stream_writers`](../../workers.md#stream-writers) needs
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a HTTP replication listener, and that listener should be included in the `instance_map`.
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(The main process also needs an HTTP replication listener, but it should not be
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(The main process also needs an HTTP replication listener, but it should not be
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listed in the `instance_map`.)
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Example configuration:
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@ -3902,8 +3916,8 @@ worker_replication_http_tls: true
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---
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### `worker_listeners`
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A worker can handle HTTP requests. To do so, a `worker_listeners` option
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must be declared, in the same way as the [`listeners` option](#listeners)
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A worker can handle HTTP requests. To do so, a `worker_listeners` option
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must be declared, in the same way as the [`listeners` option](#listeners)
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in the shared config.
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Workers declared in [`stream_writers`](#stream_writers) will need to include a
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@ -3922,7 +3936,7 @@ worker_listeners:
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### `worker_daemonize`
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Specifies whether the worker should be started as a daemon process.
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If Synapse is being managed by [systemd](../../systemd-with-workers/README.md), this option
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If Synapse is being managed by [systemd](../../systemd-with-workers/README.md), this option
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must be omitted or set to `false`.
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Defaults to `false`.
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@ -3934,11 +3948,11 @@ worker_daemonize: true
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---
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### `worker_pid_file`
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When running a worker as a daemon, we need a place to store the
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When running a worker as a daemon, we need a place to store the
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[PID](https://en.wikipedia.org/wiki/Process_identifier) of the worker.
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This option defines the location of that "pid file".
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This option is required if `worker_daemonize` is `true` and ignored
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This option is required if `worker_daemonize` is `true` and ignored
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otherwise. It has no default.
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See also the [`pid_file` option](#pid_file) option for the main Synapse process.
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@ -3988,4 +4002,3 @@ background_updates:
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min_batch_size: 10
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default_batch_size: 50
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```
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@ -505,6 +505,9 @@ worker application type.
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### `synapse.app.pusher`
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It is likely this option will be deprecated in the future and is not recommended for new
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installations. Instead, [use `synapse.app.generic_worker` with the `pusher_instances`](usage/configuration/config_documentation.md#pusher_instances).
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Handles sending push notifications to sygnal and email. Doesn't handle any
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REST endpoints itself, but you should set
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[`start_pushers: false`](usage/configuration/config_documentation.md#start_pushers) in the
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@ -543,6 +546,9 @@ Note this worker cannot be load-balanced: only one instance should be active.
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### `synapse.app.federation_sender`
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It is likely this option will be deprecated in the future and not recommended for
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new installations. Instead, [use `synapse.app.generic_worker` with the `federation_sender_instances`](usage/configuration/config_documentation.md#federation_sender_instances).
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Handles sending federation traffic to other servers. Doesn't handle any
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REST endpoints itself, but you should set
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[`send_federation: false`](usage/configuration/config_documentation.md#send_federation)
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@ -639,7 +645,9 @@ equivalent to `synapse.app.generic_worker`:
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* `synapse.app.client_reader`
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* `synapse.app.event_creator`
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* `synapse.app.federation_reader`
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* `synapse.app.federation_sender`
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* `synapse.app.frontend_proxy`
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* `synapse.app.pusher`
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* `synapse.app.synchrotron`
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