Release of Canton 3.5.3

Canton 3.5.3 has been released on June 03, 2026.

Summary

This is a maintenance release that fixes an issue around mediator restart and LSU.

Bugfixes

Mediator cannot reconnect to sequencer after processing LSU sequencing test message

During LSU, after processing a sequencing test message, a mediator cannot reconnect to the sequencer. The connection issue resolves itself when the upgrade time is reached and traffic is initialized on the sequencer.

Compatibility

The following Canton protocol versions are supported:

Dependency	Version
Canton protocol versions	34, 35

Canton has been tested against the following versions of its dependencies:

Dependency	Version
Java Runtime	OpenJDK 64-Bit Server VM (build 21.0.12+2-nixos, mixed mode, sharing)
Postgres	Recommended: PostgreSQL 17.10 (Debian 17.10-1.pgdg13+1) – Also tested: PostgreSQL 14.23 (Debian 14.23-1.pgdg13+1), PostgreSQL 15.18 (Debian 15.18-1.pgdg13+1), PostgreSQL 16.14 (Debian 16.14-1.pgdg13+1)

Overview

Validator Deployment

Super Validator Deployment

Splice Fundamentals

Canton Console

Production Operations

Extension Synchronizers

Troubleshooting

Release Notes

Reference

Community Resources

3.5.3

Release of Canton 3.5.3

Summary

Bugfixes

Mediator cannot reconnect to sequencer after processing LSU sequencing test message

Compatibility

​Release of Canton 3.5.3

​Summary

​Bugfixes

​Mediator cannot reconnect to sequencer after processing LSU sequencing test message

​Compatibility

Release of Canton 3.5.3

Summary

Bugfixes

Mediator cannot reconnect to sequencer after processing LSU sequencing test message

Compatibility