WARNING: Version 6.1 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.
Previously when Elasticsearch was bound to localhost, Elasticsearch would bind
to any address on the loopback device. This included link-local addresses on the
loopback device such as
fe80::1%lo0 on macOS. Starting in 6.1.2, Elasticsearch
will now only bind to loopback addresses on the loopback device. Because of the
previous behavior, Elasticsearch would skip the bootstrap checks if bound to a
link-local address. Now that Elasticsearch no longer binds to such addresses
when binding to localhost, the bootstrap checks now apply to link-local