Compatibility with host parsing when sniffing host in elasticsearch ver 1.x

[jffifa]

Host sniffing use "/_nodes/_all/clear" to get hosts information,
where address returned in elasticsearch ver 1.x in format inet\[/IP:PORT\] like

"transport_address" : "inet[/192.168.0.2:9300]"

while in ver 2.x in format [HOSTNAME/]IP:PORT like

"transport_address" : "192.168.0.2:9300"

Such case cause incompatibility with parsing host info using client ver 2.x in elasticsearch 1.x, which obstructs upgrading from 1.x to 2.x in some respects.

[honzakral]

The client is not backwards compatible - if you use Elasticsearch 1.x you have to also use 1.x version of the client, same for 2.x - always keep the major version in sync.

There are other differences between the versions that cannot be bridged like this one so there is nothing we can do unfortunately - you have to chose the correct version to use.