Unable to add a new node

Elastic Stack Elasticsearch
5

Hi David,
the error on new cluster noded, which isnot getting added is like this:

(AbstractChannel.java:206)
	at org.elasticsearch.transport.netty.NettyTransport.exceptionCaught(NettyTransport.java:611)
	at org.elasticsearch.transport.netty.MessageChannelHandler.exceptionCaught(MessageChannelHandler.java:239)
	at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.exceptionCaught(FrameDecoder.java:377)
	at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.elasticsearch.common.netty.OpenChannelsHandler.handleUpstream(OpenChannelsHandler.java:74)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	at org.elasticsearch.common.netty.channel.Channels.fireExceptionCaught(Channels.java:525)
	at org.elasticsearch.common.netty.channel.AbstractChannelSink.exceptionCaught(AbstractChannelSink.java:48)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.notifyHandlerException(DefaultChannelPipeline.java:658)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:566)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.elasticsearch.common.netty.OpenChannelsHandler.handleUpstream(OpenChannelsHandler.java:74)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:268)
	at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:255)
	at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at org.elasticsearch.common.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.elasticsearch.common.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:748)
[2017-07-24 12:20:41,809][INFO ][discovery.ec2            ] [Moon-Boy] failed to send join request to master [[Master Man][ril_ipI4SYqtlg4Bh3bpnw][ip-10-0-21-253][inet[/10.0.21.253:9300]]{master=true}], reason [RemoteTransportException[[Master Man][inet[/10.0.21.253:9300]][internal:discovery/zen/join]]; nested: ConnectTransportException[[Moon-Boy][inet[/10.0.21.168:9300]] connect_timeout[30s]]; ]
[2017-07-24 12:21:32,089][INFO ][discovery.ec2            ] [Moon-Boy] failed to send join request to master [[Master Man][ril_ipI4SYqtlg4Bh3bpnw][ip-10-0-21-253][inet[/10.0.21.253:9300]]{master=true}], reason [RemoteTransportException[[Master Man][inet[/10.0.21.253:9300]][internal:discovery/zen/join]]; nested: ConnectTransportException[[Moon-Boy][inet[/10.0.21.168:9300]] connect_timeout[30s]]; ]
[2017-07-24 12:22:22,664][INFO ][discovery.ec2            ] [Moon-Boy] failed to send join request to master [[Master Man][ril_ipI4SYqtlg4Bh3bpnw][ip-10-0-21-253][inet[/10.0.21.253:9300]]{master=true}]