Version 6.2.8

Released on 2026-05-13.

Note

If you are upgrading a cluster, you must be running CrateDB 5.0.0 or higher before you upgrade to 6.2.8.

We recommend that you upgrade to the latest 6.1 release before moving to 6.2.8.

A rolling upgrade from >= 6.1.2 to 6.2.8 is supported. Doing a rolling upgrade from an earlier version than 6.1.2 can cause runtime errors when executing statements relying on implicit casts.

Before upgrading, you should back up your data.

Warning

Tables that were created before CrateDB 5.x will not function with 6.x and must be recreated before moving to 6.x.x.

You can recreate tables using COPY TO and COPY FROM or by inserting the data into a new table.

Table of contents

See the Version 6.2.0 release notes for a full list of changes in the 6.2 series.

Fixes

• Fixed an issue that could cause queries against sys.allocations to fail if concurrently resizing the shards of a table.

• Fixed a performance regression introduced in 6.0.0 that could cause INSERT INTO <table> VALUES (...) bulk statements that hit many shards to be less aggressive than possible, taking longer than necessary.

  To mitigate the issue in earlier versions it is also possible to increase the size of the write thread pool.

• Fixed an issue that lead to a NullPointerException error on selects from the sys.snapshots table and simultaneously deleting tables or partitions and running CREATE SNAPSHOT

• Fixed an issue that could lead to an OutOfMemoryError when running a distributed query with aggregations or joins under memory pressure.

• Fixed an authorization issue for _blobs HTTP endpoint.