今天重装了服务器的系统之后，重新在两台服务器布署es集群之后，发现es启动报错：

[2015-06-16 10:33:33,455][WARN ][transport.netty          ] [ElasticSearch_01] exception caught on transport layer [[id: 0x10560167]], closing connectionjava.net.NoRouteToHostException: No route to host        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)        at org.elasticsearch.common.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)        at org.elasticsearch.common.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)        at org.elasticsearch.common.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)        at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)        at org.elasticsearch.common.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)        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:745)

经过排查后,是防火墙对9200和9300端口做了限制,关掉防火墙或者开放指定的端口就可以了.