Requests to the bulk API comprise a sequence of items, each of which
starts with a JSON object describing the item. This object includes the
type of action to perform with the item which should be one of `create`,
`update`, `index`, or `delete`. In earlier versions Elasticsearch would
ignore items with an unrecognized type, skipping the next line in the
request, but this lenient behaviour means that there is no way for the
client to associate the items in the response with the items in the
request, and in some cases it would cause the remainder of the request
to be parsed incorrectly.
With this commit, requests to the bulk API must comprise only items with
recognized types. Elasticsearch will reject requests containing any
items with an unrecognized type with a `400 Bad Request` error response.
DiscoveryPlugin allows extending getJoinValidator and
getElectionStrategies. These are implementation details of the system.
This commit deprecates these methods so that plugin authors are
discouraged from overriding them.
Network plugins provide network implementations. In the past this has
been used for alternatives to netty based networking, using the JDK's
nio. However, nio has now been removed, and it is inadvisable for a
plugin to implement this low level part of the system.
Therefore, this commit marks the NetworkPlugin interface as deprecated.
James Rodewig
Abdon Pijpelink
David Turner
Ryan Ernst