hadoop put 问题与jps问题

1 jps 问题，jps not found ……

主要是$JAVA_HOME问题

分别修改 ~/.profile 、 /etc/profile在文件最后填加$JAVA_HOME及路径

export JAVA_HOME=/usr/share/jdk1.8.0_181#具体java路径
export JRE_HOME=${JAVA_HOME}/jre 
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib 
export PATH=${JAVA_HOME}/bin:$PATH

分别source ~/.profile  、/etc/profile

 

2 

put: File /input/wordfile1.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.
删除 配置文件中的根目录，例如

<name>hadoop.tmp.dir</name>

<>file:/usr/local/hadoop/tmp<>

删除tmp目录

hdfs namenode -format

start-dfs.sh 

hsdf dfs -put ./test  /test