hadoop datanode日志报错

2016-04-10 11:35:08,998 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in offerService
java.io.EOFException: End of File Exception between local host is: "master/10.13.6.186"; destination host is: "master":9000; : java.io.EOFException; For more details see: http://wiki.apache.org/hadoop/EOFException

ioexception应该是文件传输失败了吧

文件结束异常; 格式化 namenode

 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: hadoop101/192.168.8.101:9000
    这是datanode的日志文件报的错误  这是什么问题???