http://www.linuxidc.com/Linux/2015-05/117493.htm
其中僞分布式部署時:
出現如下問題的話
接着開啟 NaneNode 和 DataNode 守護程序。
[email protected]:~/opt/hadoop-2.6.0$ sbin/start-dfs.sh
出現下面的錯誤提示:
Starting namenodes on [localhost]
localhost: Error: JAVA_HOME is not set and could not be found.
localhost: Error: JAVA_HOME is not set and could not be found.
Starting secondary namenodes [0.0.0.0]
解決辦法:
打開$HADOOP_HOME/etc/hadoop/mapred-env.sh檔案,修改
export JAVA_HOME=/usr/local/java
(這個文檔裡面好像有點問題。)