Version 2.3.5

Released on 2018/03/20.


If you are upgrading a cluster, you must be running CrateDB Version 1.1.3 or higher before you upgrade to 2.3.5.

If you want to perform a rolling upgrade, your current CrateDB version number must be at least Version 2.3.0. Any upgrade from a version prior to this will require a full restart upgrade.


Before upgrading, you should back up your data.

Table of contents



  • Fixed handling of NULL values correctly in the cluster tab of the Admin UI.

  • Updated the Size label in the table detail tab of the Admin UI to Size (Sum of primary shards).

  • Fixed an issue where ordering by a TIMESTAMP scalar would cause the query to get stuck.

  • Fixed a potential NullPointerException when running SHOW CREATE TABLE with plain type indices.

  • Fixed an issue that would cause queries ordered by a STRING scalar with possible NULL values to get stuck.

  • Fixed an issue that caused nodes to crash with OutOfMemoryException when executing queries with ORDER BY on large data sets. Instead, the query circuit breaker is tripped, the query is killed and the node’s health is unaffected.

  • Improved the error handling for a race condition to make sure it doesn’t cause queries to get stuck.

  • Improved the behaviour in case the cluster drops below the number of minimum nodes. The root REST endpoint will no longer timeout and sys.checks can still be queried, similar to how sys.nodes can still be queried.