hadoop启动命令 start-all.sh失效解决办法

Question

在运行start-all.sh后出现以下报错

[root@node01 sbin]# start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
24/03/20 08:41:27 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [node01]
node01: namenode running as process 3352. Stop it first.
node03: datanode running as process 3367. Stop it first.
node02: datanode running as process 3345. Stop it first.
node01: datanode running as process 3474. Stop it first.
Starting secondary namenodes [node01]
node01: secondarynamenode running as process 3627. Stop it first.
24/03/20 08:41:31 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
resourcemanager running as process 3772. Stop it first.
node02: nodemanager running as process 3443. Stop it first.
node03: nodemanager running as process 3465. Stop it first.
node01: nodemanager running as process 3872. Stop it first.

Answer 1

让阿豪来帮你解答，本回答参考chatgpt3.5编写提供，如果还有疑问可以评论或留言

问题：为什么在运行start-all.sh后会出现错误报告，并显示namenode和datanode已在运行中？ 回答：

1. 报错原因：start-all.sh脚本已被弃用。在最新版本的Hadoop中，需要分别使用start-dfs.sh和start-yarn.sh来启动Hadoop集群。
2. 解决方法：使用正确的启动命令来启动Hadoop集群，运行以下两个命令：

sbin/start-dfs.sh
sbin/start-yarn.sh

1. 示例代码：

# 启动Hadoop集群
cd /usr/local/hadoop
sbin/start-dfs.sh
sbin/start-yarn.sh

注意，如果还出现无法加载native-hadoop库的警告，说明您所使用的操作系统不支持该库，可以忽略这条警告信息。