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TSB-2025-26 Users of the beta feature Iceberg Topics in Redpanda version 24.3.x could experience beta defects that eventually lead to cluster instability.

  • Updated

Summary: 

Redpanda users on Redpanda versions under 24.3.x, with the Iceberg Beta Feature enabled at the cluster level and on a topic are potentially exposed to various defects in Iceberg Topics. Some beta defects have the potential to lead to cluster instability including disk space issues over time, particularly when using Iceberg topics in conjunction with other workloads.  It’s important that users beta testing Iceberg Topics in 24.3 disable Iceberg topics at the completion of their testing and use caution when testing Iceberg Topics beta  in shared environments (e.g. pre-production/staging clusters) where their work may impact other users. Furthermore, as Iceberg topics have reached GA in the now available Redpanda 25.1 release, all users intending to further test and deploy Iceberg Topics, in both test and production environments, are strongly recommended to use Redpanda 25.1.1 or later

Severity: 

Low 

Redpanda Products Affected:

  • Redpanda Self-Managed - Enterprise
  • Redpanda Self-Managed - Community

Release Affected:

Redpanda Versions 24.3.1-24.3.x

Identification:

If you have Iceberg Beta Feature enabled at the cluster level you could encounter this problem.  This is not set by default, and you can check using the following RPK command.

rpk cluster config get iceberg_enabled

To see which topics have Iceberg enabled you can use the following command.

rpk topic list -a | grep -B 1 -A 1 "redpanda.iceberg.mode" | grep -v "disabled"

Impact: 

Various issues can have varying impact to cluster stability, in some cases even if Iceberg Topics are not in active use (receiving data), but the feature is enabled. In at least one case, clusters can run into unexpected issues with disk space

Action required: 

These issues are resolved in all redpanda 25.1.x versions.  Either upgrade to the newest 25.1.x version, or disable Iceberg at the cluster level as follows.  

rpk cluster config set iceberg_enabled=false

You will also need to delete any topics which have the topic property redpanda.iceberg.mode set to anything other than ‘none’

If for any reason you are unable to delete any of these topics, please contact Redpanda Support for further assistance.

Questions? If you have any questions on this TSB, or need further guidance, please contact Redpanda Support