Canton 2.6.1

Canton 2.6.1 has been released on March 31, 2023. You can download the Daml Open Source edition from the Daml Connect Github Release Section. The Enterprise edition is available on Artifactory. Please also consult the full documentation of this release.

Summary

This is a maintenance release, fixing a performance degradation. Production systems of 2.6.0 are advised to consume the upgrade.

What’s New

Activation of unsupported features

In order to activate unsupported features, you now need to explicitly enable dev-version-support on the domain (in addition to the non-standard config flag). More information can be found in the documentation.

Security and Bugfixes

• Fixed a performance degradation in the mediator and database sequencer that leads to slow performance degradations after running a process for days.
• Fixed an issue in HA participants under high load that may cause a passive replica to not serve transactions when becoming active again.
• Fixed the database sequencer max-event-age metric not to report excessively old event ages.
• Fixed an issue in HA database sequencer setups with automatic scheduled pruning when a sequencer loses write-access to "exclusive storage". Now another sequencer takes over automatic pruning.
• Fixed a startup issue where a domain manager / mediator sequencer connection couldn't be changed without starting up cleanly.
• Fixed an issue where high available sequencer readers were creating higher database load than necessary.

Compatibility

The following Canton protocol and Ethereum sequencer contract versions are supported:

Dependency	Version
Canton protocol versions	3, 4
Ethereum contract versions	1.0.0, 1.0.1

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

Dependency	Version
Java Runtime	OpenJDK 64-Bit Server VM Zulu11.62+17-CA (build 11.0.18+10-LTS, mixed mode)
Postgres	postgres (PostgreSQL) 14.7 (Debian 14.7-1.pgdg110+1)
Oracle	19.15.0
Besu	besu/v22.1.3/linux-x86_64/openjdk-java-11
Fabric	2.2.2