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Docs: Federation troubleshooting re: Cloudflare

A-Docsthings relating to the documentationthings relating to the documentation

A-Federation

T-EnhancementNew features, changes in functionality, improvements in performance, or user-facing enhancements.New features, changes in functionality, improvements in performance, or user-facing enhancements.

Status: Open.

#16228 In matrix-org/synapse;

· caseyWebb opened on Sep 2, 2023

Synapse doesn't backfill missing events when rejoining a room later

A-Federation

A-Messages-Endpoint/messages client API endpoint (`RoomMessageListRestServlet`) (which also triggers /backfill)/messages client API endpoint (`RoomMessageListRestServlet`) (which also triggers /backfill)

O-OccasionalAffects or can be seen by some users regularly or most users rarelyAffects or can be seen by some users regularly or most users rarely

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15717 In matrix-org/synapse;

· sbug0 opened on Jun 5, 2023

Optimize <code>/backfill</code> to respond faster

A-Federation

A-Messages-Endpoint/messages client API endpoint (`RoomMessageListRestServlet`) (which also triggers /backfill)/messages client API endpoint (`RoomMessageListRestServlet`) (which also triggers /backfill)

A-PerformancePerformance, both client-facing and admin-facingPerformance, both client-facing and admin-facing

T-EnhancementNew features, changes in functionality, improvements in performance, or user-facing enhancements.New features, changes in functionality, improvements in performance, or user-facing enhancements.

Status: Open.

#15653 In matrix-org/synapse;

· MadLittleMods opened on May 23, 2023

 ·  

Faster /messages

No backoff on <code>v1/user/devices</code> requests for homeservers that have been reset

A-Device-List-TrackingTelling clients about other devices. Often related to E2EE.Telling clients about other devices. Often related to E2EE.

A-Federation

O-UncommonMost users are unlikely to come across this or unexpected workflowMost users are unlikely to come across this or unexpected workflow

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15365 In matrix-org/synapse;

· phesch opened on Apr 1, 2023

"Your server isn't divulging details about prev_events referenced in this event" upon join, when other servers create events without incrementing <code>depth</code>

A-DAGDirected acyclic graph of events (events connected by prev_events)Directed acyclic graph of events (events connected by prev_events)

A-Federated-Joinjoins over federation generally suckjoins over federation generally suck

A-Federation

O-UncommonMost users are unlikely to come across this or unexpected workflowMost users are unlikely to come across this or unexpected workflow

S-MajorMajor functionality / product severely impaired, no satisfactory workaround.Major functionality / product severely impaired, no satisfactory workaround.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15320 In matrix-org/synapse;

· progval opened on Mar 24, 2023

Better handling of (reverse) connection issues in federation requests

A-E2EEEnd-to-end encryption for Matrix clientsEnd-to-end encryption for Matrix clients

A-Federation

O-OccasionalAffects or can be seen by some users regularly or most users rarelyAffects or can be seen by some users regularly or most users rarely

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-TaskRefactoring, removal, replacement, enabling or disabling functionality, other engineering tasks.Refactoring, removal, replacement, enabling or disabling functionality, other engineering tasks.

Z-Help-WantedWe know exactly how to fix this issue, and would be grateful for any contributionWe know exactly how to fix this issue, and would be grateful for any contribution

Status: Open.

#15279 In matrix-org/synapse;

· lukas2511 opened on Mar 17, 2023

<code>/event</code> does not try to backfill unknown events from federation

A-Federation

O-OccasionalAffects or can be seen by some users regularly or most users rarelyAffects or can be seen by some users regularly or most users rarely

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15263 In matrix-org/synapse;

· MadLittleMods opened on Mar 13, 2023

Federation catch-up is not necessarily correct due to the sharding of the event stream

A-Federation

O-UncommonMost users are unlikely to come across this or unexpected workflowMost users are unlikely to come across this or unexpected workflow

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15260 In matrix-org/synapse;

· reivilibre opened on Mar 13, 2023

Large rooms are stuck in partial-state because of response body size limit on <code>/state</code> federation API

A-Federated-Joinjoins over federation generally suckjoins over federation generally suck

A-Federation

O-UncommonMost users are unlikely to come across this or unexpected workflowMost users are unlikely to come across this or unexpected workflow

S-CriticalBlocks development, potential data loss, more than 25% of users possibly affected, no workarounds.Blocks development, potential data loss, more than 25% of users possibly affected, no workarounds.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#15127 In matrix-org/synapse;

· reivilibre opened on Feb 21, 2023

Federation workers continue accepting events after the event persister crashes, losing them

A-Federation

O-UncommonMost users are unlikely to come across this or unexpected workflowMost users are unlikely to come across this or unexpected workflow

S-MajorMajor functionality / product severely impaired, no satisfactory workaround.Major functionality / product severely impaired, no satisfactory workaround.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#14924 In matrix-org/synapse;

· turt2live opened on Jan 26, 2023

Deleting stale devices causes lots of device updates to be sent out over federation

A-Device-List-TrackingTelling clients about other devices. Often related to E2EE.Telling clients about other devices. Often related to E2EE.

A-Federation

S-MinorBlocks non-critical functionality, workarounds exist.Blocks non-critical functionality, workarounds exist.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

Status: Open.

#14651 In matrix-org/synapse;

· anoadragon453 opened on Dec 9, 2022

major state reset / corruption bug impacting the main official GrapheneOS room

A-Federation

O-OccasionalAffects or can be seen by some users regularly or most users rarelyAffects or can be seen by some users regularly or most users rarely

S-MajorMajor functionality / product severely impaired, no satisfactory workaround.Major functionality / product severely impaired, no satisfactory workaround.

T-DefectBugs, crashes, hangs, security vulnerabilities, or other reported issues.Bugs, crashes, hangs, security vulnerabilities, or other reported issues.

z-WTFCausing the user to exclaim! These issues are high impact and low effort.Causing the user to exclaim! These issues are high impact and low effort.

Status: Open.

#14481 In matrix-org/synapse;

· thestinger opened on Nov 18, 2022