hadoop - 名称节点启动错误

Question

当我尝试在主节点上启动 hadoop 时，我得到以下输出。并且 namenode 没有启动。

[hduser@dellnode1 ~]$ start-dfs.sh
starting namenode, logging to /usr/local/hadoop/bin/../logs/hadoop-hduser-namenode-dellnode1.library.out
dellnode1.library: datanode running as process 5123. Stop it first.
dellnode3.library: datanode running as process 4072. Stop it first.
dellnode2.library: datanode running as process 4670. Stop it first.
dellnode1.library: secondarynamenode running as process 5234. Stop it first.
[hduser@dellnode1 ~]$ jps
5696 Jps
5123 DataNode
5234 SecondaryNameNode

Answer 1

“先停下来”。

• 先调用stop-all.sh

• 输入jps

• 调用 start-all.sh(或 start-dfs.sh 和 start-mapred.sh)

• 键入 jps(如果 namenode 没有出现，键入“hadoop namenode”并检查错误)