Release Date: 18 January 2019
Neo4j 3.4.12 is a maintenance release with many important improvements and fixes.


  • When a native memory allocation fails, Neo4j will now include helpful debugging information in all such cases, instead of just some of them.
  • Close all index readers opened during lockingNodeUniqueIndexSeek
  • Fixes a race updating the label index, where e.g. a node CREATE followed by DELETE could be reordered into DELETE followed by CREATE, and vice versa.
  • Obsfucate LDAP system password in debug log

Detailed Changes and Docs

For the complete list of all changes, please see the changelog. Look for 3.4 Developer manual here, and 3.4 Operations manual here.


When upgrading to Neo4j 3.4 for the first time, be sure to read the current upgrade instructions in the Neo4j Operations Manual, as there are additional steps and considerations.