Hadoop异常：Bad connect ack with firstBadLink
hadoop抛出如下异常：
INFO org.apache.hadoop.dfs.DataNode: Receivingblock blk_4171702026185885604 src: /xxx.xxx.xxx.xxx:36669dest: /xxx.xxx.xxx.xxx:50010INFO org.apache.hadoop.dfs.DataNode: writeBlockblk_4171702026185885604 received exceptionjava.net.NoRouteToHostException: No route to hostERROR org.apache.hadoop.dfs.DataNode:xxx.xxx.xxx.xxx:50010:DataXceiver: java.net.NoRouteToHostException: Noroute to hostat sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)at sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:100)at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:1150)at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:994)at java.lang.Thread.run(Thread.java:619)
