Hadoop「not get namenode with jps command」爲什麼namenode沒有啓動

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[email protected]:/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 
[email protected]:/usr/local/hadoop$ jps 
52396 DataNode 
53151 Jps 
53072 NodeManager 
52660 SecondaryNameNode 
52860 ResourceManager

來源

2015-07-22 sanjeev

詳細說明您的問題 –

檢查namenode日誌並找到確切的問題。我相信你是第一次開始這個。一個問題，你是否在嘗試啓動之前格式化了namenode。 –

我必須在每次啓動之前合成namenode。 – sanjeev

您應該在每次啓動之前格式化您的namenode。

$HADOOP_INSTALL/hadoop/bin/hadoop namenode -format

來源

2015-07-22 09:31:43 masoumeh

請問您爲什麼需要在啓動hadoop前每次格式化nodename？ – sanjeev

感謝您的回覆 – sanjeev

這是hadoop的規則。我不知道這背後是什麼概念。 – masoumeh

Hadoop「not get namenode with jps command」爲什麼namenode沒有啓動

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