hadoop DN不能启动,报错：DataXceiver error processing WRITE_BLOCK operation

ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: hadoop-yarn.cloudyhadoop.com:50010:DataXceiver error processing READ_BLOCK operation  src: /192.168.1.104:52441 dst: /192.168.1.20:50010

修改数据传输线程个数
vi hdfs-site.xml
添加：

   
    dfs.datanode.max.transfer.threads   
    8192   
       
        Specifies the maximum number of threads to use for transferring data  
        in and out of the DN.   
      
  

复制到其它节点，并重启datanode。