hadoop集群中的主机名不能带有下划线。

<!-- lang: shell -->

[hadoop@PROC_141 bin]$ cat /etc/profile.d/hadoop.sh export HADOOP_HOME=/opt/old/htt/hadoop/hadoop-2.5.1export HADOOP_PREFIX=/opt/old/htt/hadoop/hadoop-2.5.1export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_PREFIX"/lib/native"export HADOOP_HDFS_HOME="$HADOOP_PREFIX"export HADOOP_COMMON_HOME="$HADOOP_PREFIX"export HADOOP_YARN_HOME="$HADOOP_HOME"export HADOOP_CONF_DIR="$HADOOP_PREFIX"/etc/hadoopexport HADOOP_OPTS=-Djava.library.path="$HADOOP_PREFIX"libexport HADOOP_MAPRED_HOME="$HADOOP_PREFIX"export PATH=$PATH:$HADOOP_PREFIX/bin:$HADOOP_PREFIX/sbinvim $HADOOP_PREFIX/etc/hadoop/core-site.xml 
      
           
      
       fs.defaultFS
            
      
       hdfs://PROC-141
        
       
             
      
       fs.default.name
              
      
       hdfs://PROC-141:9000
        
     
    vim $HADOOP_PREFIX/etc/hadoop/hdfs-site.xml 
      
         
      
       dfs.datanode.data.dir
          
      
       file:///home/hadoop/local/var/hadoop/hdfs/datanode
        
       
         
      
       dfs.namenode.name.dir
          
      
       file:///home/hadoop/local/var/hadoop/hdfs/namenode
        
       
         
      
       dfs.namenode.checkpoint.dir
          
      
       file:///home/hadoop/local/var/hadoop/hdfs/namesecondary
        
       
         
      
       dfs.replication
          
      
       1
        
     
    

[hadoop@PROC_141 bin]$ jps 12216 NameNode 12362 DataNode 13915 Jps 12574 SecondaryNameNode 13023 NodeManager 12895 ResourceManager