Canton 2.3.13

Canton 2.3.13 has been released on June 15, 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 bugfix only release of Canton with two improvements in the crash recovery of a participant node.

What’s New

Bugfixes

Crash recovery bug in request counter allocator for repair requests

Description : When using the repair service of a participant, the participant may fail to reconnect to the domains affected by the repairs.

Affected deployments : All deployments

Affected versions : All currently released enterprise versions of Canton.

Impact : The participant cannot connect to the affected domain any more.

Symptom : The participant log file contains an ERROR message of the form An internal error has occurred. java.lang.IllegalArgumentException: Cannot skip request counter ... other than the next request counter ...

Workaround : Upgrading to a Canton version with the released bug fix should resolve the problem.

Likelihood of the bug : The bug can occur only if the repair service is used on a participant. The repair service is internally used by the party migration console macros, for example.

Recommendation : Upgrade the participant to a Canton version with the bug fix and restart the node.

Crash recovery bug in ACS commitment processing

Description : A participant may fail to reconnect to a domain and the reconnect attempt seems stuck.

Affected deployments : All deployments

Affected versions : All currently released enterprise versions of Canton.

Impact : The participant cannot connect to a domain any more.

Symptom : No error is logged in the participants log file, but the reconnect command will appear to be stuck.

Workaround : Upgrading to a Canton version with the released bug fix should resolve the problem.

Likelihood of the bug : The bug occurs only for a particular order of events that are processed during the reconnect of a participant to a domain. Not all participant nodes may be affected for the same domain.

Recommendation : Upgrade the participant to a Canton version with the bug fix and restart the node.

Compatibility

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

Dependency	Version
Canton protocol versions	2.0.0, 3.0.0
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 18.9 (build 11.0.16+8, mixed mode, sharing)
Postgres	postgres (PostgreSQL) 14.8 (Debian 14.8-1.pgdg120+1)
Oracle	19.15.0
Besu	besu/v21.10.9/linux-x86_64/openjdk-java-11
Fabric	2.2.2