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Apache Kylin

ANALYTICS
Velocity2.5

Distributed OLAP engine providing sub-second queries on large datasets

kylin.apache.org ↗

Kylin ships once a year with empty release notes and a native engine nobody is being told about.

olapglutennative-executioninternal-tablessparse-releases
◆Current state
Apache Kylin's release stream is close to silent. Four of the six most recent tags carry nothing but the Maven release plugin's own commit message, and 5.0.4 in July 2026 arrived ten months after 5.0.3 with no notes at all. The last release that documented anything was 5.0.2 in April 2025, covering internal-table caching, partition-aware file merging and Gluten jar loading order.
◆Where it's heading
The substance is in 5.0.0 and its follow-ups: Gluten with a ClickHouse backend as a native execution engine, internal tables, streaming and fusion models. That is a real architectural bet on native vectorised execution, but the project is not communicating it — releases ship as bare tags, and the gap between 5.0.3 and 5.0.4 suggests development has thinned to a trickle. For anyone tracking Kylin from the outside, the release feed is effectively no signal.
◆Prediction
The entries do not support a confident call on what ships next; with untitled tags roughly annually, the useful signal about Kylin's direction will come from JIRA and the mailing list rather than from releases.

◆Recent moves

  1. 27d ago

    5.0.4 tagged with no release notes

    A release tag carrying only the Maven release plugin's commit message, ten months after the previous one. Whatever changed is invisible from here, which is itself the most informative thing about Kylin's current cadence.

    View source ↗
  2. 10mo ago

    5.0.3 tagged with no release notes

    Another bare Maven release tag. Two consecutive undocumented releases mean the changelog feed carries no usable signal about the 5.0.x line.

    View source ↗
  3. 1y ago

    Internal table caching, partition file merging, Gluten fixes

    The last release that actually documented its contents: internal table preloading and cache, file merging within partitions, and configuration to query internal tables directly. It reads as follow-through on the 5.0.0 architecture rather than new direction.

    View source ↗
  4. 1y ago

    Apache Kylin 5.0.0

    ⚡ SPARK

    The release the rest of the 5.0.x line is still servicing. Everything documented since — internal table caching, partition merging, Gluten loader fixes — is maintenance on the architecture introduced here.

    View source ↗
  5. 1y ago

    Streaming function fix

    A single-issue fix to a streaming function, tagged hours after 5.0.0. Housekeeping on the major release.

    View source ↗
  6. 2y ago

    4.0.5 tagged on the legacy line

    An undocumented tag on the superseded 4.0.x line from early 2024. The 4.x train has been quiet since.

    View source ↗