Couldn't able to connect to elasticsearch via XDCR

Hi Team,
while am trying to connect to elasticsearch from couchbase am getting the below error, what would be the reason for this ?
Error : Attention: Could not connect to “” on port 9091. This could be due to an incorrect host/port combination or a firewall in place between the servers.

i have configured the credentials , host and port in elasricsearch.yml file
couchbase.username: Test
couchbase.password: password
couchbase.maxConcurrentRequests: 1024
couchbase.port: 9091


Have you check the port 9091 is open? Maybe you can check with netstat.
Also are you following this document

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