namenode起始错误

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".

• 首先调用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不显示类型"hadoop namenode"并检查错误)

Answer 2

根据在较新版本的hardoop上运行“ stop-all.sh”的说法，不建议这样做。您应该改用：

stop-dfs.sh

和

stop-yarn.sh