WARNING: Version 2.4 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
Breaking changes in 2.4edit
Settingsedit
The setting bootstrap.mlockall has been renamed to
bootstrap.memory_lock. Future versions of
Elasticsearch will refuse to start if bootstrap.mlockall is set. You
can switch to the new setting now.