Release Date: 11 August 2015

Neo4j 2.2.4 is a maintenance release, with critical improvements.

Changes in this release:

  • Improvements to Cypher performance when reading properties of nodes and relationships.
  • Resolves a Cypher semantic error when nesting multiple FOREACH clauses.
  • Resolves a Cypher runtime when encountering null values during an index seek (#4673).
  • Resolves an issue in embedded TransactionEventHandler’s, which could return an incorrect relationship type for changed or deleted relationships (#4910).
  • Removes the legacy index limit on the number of indexed properties that may be updated in a single transaction.
  • Resolves a rare issue in index recovery, that could result in indefinite blocking for subsequent index updates.
  • The neo4j import tool now handles multiline fields by default.

All Neo4j users are recommended to upgrade to this release. Upgrading to Neo4j 2.2 (from Neo4j 2.1 or earlier) requires a migration to the on-disk store and can not be reversed. Please ensure you have a valid backup before proceeding. Production users of Neo4j 2.1, or earlier, should note that there will be configuration changes required and that applications will need to be updated to support authentication of database requests. Please see our Upgrading to Neo4j 2.2 FAQ for further details.

(Note: Neo4j 1.9 users may also upgrade directly to this release, and are recommended to do so carefully. We strongly encourage verifying the syntax and validating all responses from your Cypher scripts, REST calls, and Java code before upgrading any production system. For information about upgrading from Neo4j 1.9, please see our Upgrading to Neo4j 2 FAQ.)

For a full summary of changes in this release, please review the CHANGES.TXT file contained within the distribution.