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All releases Release 95.5

UI performance improvements

Factor House·April 10, 2026

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Artifacts published with release 95.5.

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95.5 is a minor bugfix release focusing on UI performance and resolving some regressions introduced by Kpow 95.4.

Revert Kafka client libraries

95.4 updated our dependency on the Kafka clients library to 4.1.1. Some customers have reported that upgrading to 95.4 resulted in being unable to authenticate to their Kafka cluster with OAuth.

This is an open bug in Kafka that was reported in KAFKA-20184. We have reverted our dependency on the Kafka clients library back to 4.0.0 until this gets resolved.

Major UI performance overhaul

Table rendering is up to 50x faster on large 100k+ row datasets such as topic partitions and group member assignments.

The performance gains come from overhauling how we compute UI data by using better sorting algorithms, deferring computation until it is actually required by the UI, and employing smarter rendering strategies.

Changelog

Kpow

Added

  • Added a new "Snapshot age" table in the admin performance UI to better debug Kpow's internal compute

Fixed

  • Fixed regression in Kafka OAuth authentication

Changed

  • Improved logging around internal observation and materialization for better debugging
  • Improve UI performance for large Kafka deployments
  • Revert base Docker image of main tag back to Java17 from Java21