本地主机:错误:无法设置数据节点进程的优先级 32156 [英] localhost: ERROR: Cannot set priority of datanode process 32156

问题描述

我正在尝试在 ubuntu 16.04 上安装 hadoop，但是在启动 hadoop 时它会给我以下错误

I am trying to install hadoop on ubuntu 16.04 but while starting the hadoop it will give me following error

localhost: ERROR: Cannot set priority of datanode process 32156.
Starting secondary namenodes [it-OptiPlex-3020]
2017-09-18 21:13:48,343 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting resourcemanager
Starting nodemanagers

请有人告诉我为什么我会收到这个错误?提前致谢.

Please someone tell me why i am getting this error ? Thanks in advance.

推荐答案

我不得不处理同样的问题并不断收到以下异常:

I had to deal with the same issue and kept getting the following exception:

Starting namenodes on [localhost]
Starting datanodes
localhost: ERROR: Cannot set priority of datanode process 8944
Starting secondary namenodes [MBPRO-0100.local]
2019-07-22 09:56:53,020 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

正如其他人提到的，您需要首先确保所有路径参数都设置正确，这是我首先检查的.然后按照以下步骤解决问题:

As others have mentioned, you need to first make sure that all path parameters are set correctly which is what I checked first. Then followed these steps to solve the issue:

1- 停止 dfs 服务并格式化 hdfs:

1- Stop dfs service and format hdfs:

sbin/stop-dfs.sh
sudo bin/hdfs namenode -format

2- 更改 hadoop 临时目录的权限:

2- Change permissions for the hadoop temp directory:

sudo chmod -R 777 /usr/local/Cellar/hadoop/hdfs/tmp

3- 再次启动服务:

sbin/start-dfs.sh

祝你好运

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