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4.6.6.rst
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4.6.6.rst
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.. _version_4.6.6:
=============
Version 4.6.6
=============
Released on 2021-12-13.
.. NOTE::
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`_.
.. _back up your data: https://crate.io/docs/crate/reference/en/latest/admin/snapshots.html
.. rubric:: Table of Contents
.. contents::
:local:
See the :ref:`version_4.6.0` release notes for a full list of changes in the
4.6 series.
Fixes
=====
- Updated ``log4j`` to 2.15.0 to fix a security vulnerability. See `Log4Shell
<https://www.lunasec.io/docs/blog/log4j-zero-day/>`_ 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.