Version 4.6.6

Released on 2021-12-13.


If you are upgrading a cluster, you must be running CrateDB 4.0.2 or higher before you upgrade to 4.6.6.

We recommend that you upgrade to the latest 4.3 release before moving to 4.6.6.

A rolling upgrade from 4.5.x to 4.6.6 is supported.

Before upgrading, you should back up your data.

Table of Contents

See the Version 4.6.0 release notes for a full list of changes in the 4.6 series.


  • Updated log4j to 2.15.0 to fix a security vulnerability. See Log4Shell for details.

  • Fixed an issue that could result in an error if a client sent multiple statements in a single string using the PostgreSQL simple protocol mode.

  • Improved the detection of the cgroup version to support kernels where the cpu.stat and memory.stat files weren’t available at the cgroup root level.

  • Fixed an issue that could cause a deadlock, leading to an unavailable cluster if using blob tables and uploading multiple files in parallel.

  • Fixed an issue that was triggered by adding a column to a table with existing generated columns with ALTER TABLE. It caused the generated columns to become non-generated such that it could no longer generate the values.