Elastic search-2.3.4 shield SSL closing connection

I am trying to connect to elastic search-2.3.4 using shield SSL. I have succeeded in creating the certificate and the keystore as mentioned in the Shield SSL set up guide using OpenSSL and java keytool.

I am able to connect elastic search with basic shield authentication, but once I turn on the SSL settings in the elasticsearch.yml, I am getting the following exception

[2017-07-04 16:47:15,502][INFO ][gateway                  ] [Namor McKenzie] recovered [2] indices into cluster_state
[2017-07-04 16:47:16,118][INFO ][cluster.routing.allocation] [Namor McKenzie] Cluster health status changed from [RED] to [YELLOW] (reason: [shards started [[.knapsack][4], [.knapsack][4]] ...]).
[2017-07-04 16:47:35,043][WARN ][shield.transport.netty   ] [Namor McKenzie] received plaintext http traffic on a https channel, closing connection [id: 0x01956192, /XX.X.153.67:59139 => /XX.X.153.67:9200]
[2017-07-04 16:47:35,043][WARN ][shield.transport.netty   ] [Namor McKenzie] received plaintext http traffic on a https channel, closing connection [id: 0x0ed84e3b, /XX.X.153.67:59138 => /XX.X.153.67:9200]

Here are my elasticsearch.yml settings

shield.ssl.keystore.path: "D:\\elasticsearch-2.3.4\\elasticsearch-2.3.4\\config\\shield\\node01.jks"
shield.ssl.keystore.password : test1234 
shield.ssl.keystore.key_password : test1234
shield.transport.ssl : true
shield.http.ssl : true
shield.ssl.hostname_verification.resolve_name : false
network.host : XX.X.153.67
http.port : 9200

Please help me resolving this issue.

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