Hadoop“没有使用jps命令获取namenode”为什么namenode没有启动

Question

hadoop1@xyzfsdemo:/usr/local/hadoop$ sbin/start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-hadoop1-namenode-xyzfsdemo.out
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-hadoop1-datanode-xyzfsdemo.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-hadoop1-secondarynamenode-xyzfsdemo.out
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-hadoop1-resourcemanager-xyzfsdemo.out
localhost: starting nodemanager, logging to /usr/local/hadoop/logs/yarn-hadoop1-nodemanager-xyzfsdemo.out
hadoop1@xyzfsdemo:/usr/local/hadoop$ jps
52396 DataNode
53151 Jps
53072 NodeManager
52660 SecondaryNameNode
52860 ResourceManager

Answer 1

你应该在每次开始之前格式化你的namenode。

$HADOOP_INSTALL/hadoop/bin/hadoop namenode -format