我试图在单节点群集(我自己的labtop-ubuntu 12.04)上安装Hadoop。
我遵循了本教程，并逐行检查了两次。
http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/
一切似乎正确。我设置了所有core-site.xml，mapred-site.xml，hdfs-site.xml。
当我在hduser su中运行以下命令时:
hduser@maziyar-Lenovo-IdeaPad-U300s:~$ /usr/local/hadoop/usr/sbin/start-all.sh
我收到以下错误:
Warning: $HADOOP_HOME is deprecated.
starting namenode, logging to /usr/local/hadoop/usr/libexec/../logs/hadoop-hduser-namenode-maziyar-Lenovo-IdeaPad-U300s.out
cat: /usr/local/hadoop/usr/libexec/../etc/hadoop/slaves: No such file or directory
cat: /usr/local/hadoop/usr/libexec/../etc/hadoop/masters: No such file or directory
starting jobtracker, logging to /usr/local/hadoop/usr/libexec/../logs/hadoop-hduser-jobtracker-maziyar-Lenovo-IdeaPad-U300s.out
cat: /usr/local/hadoop/usr/libexec/../etc/hadoop/slaves: No such file or directory
我将导出HADOOP_HOME_WARN_SUPPRESS =“TRUE”添加到hadoop-env.sh中，并且仍然存在相同的错误。
在文件/home/hduser/.bashrc上，我猜我的错误来自:
# Set Hadoop-related environment variables
export HADOOP_HOME=/usr/local/hadoop
# Set JAVA_HOME (we will also configure JAVA_HOME directly for Hadoop later on)
export JAVA_HOME=/usr/lib/jvm/jdk-7u10-linuxi586/usr/java/jdk1.7.0_10
# Some convenient aliases and functions for running Hadoop-related commands
unalias fs &> /dev/null
alias fs="hadoop fs"
unalias hls &> /dev/null
alias hls="fs -ls"
# If you have LZO compression enabled in your Hadoop cluster and
# compress job outputs with LZOP (not covered in this tutorial):
# Conveniently inspect an LZOP compressed file from the command
# line; run via:
#
# $ lzohead /hdfs/path/to/lzop/compressed/file.lzo
#
# Requires installed 'lzop' command.
#
lzohead () {
hadoop fs -cat $1 | lzop -dc | head -1000 | less
}
# Add Hadoop bin/ directory to PATH
export PATH=$PATH:$HADOOP_HOME/usr/sbin
我将/ usr / sbin添加为bin目录，因为那里存在start-all.sh和命令。
我还尝试了bashrc文件中的“HADOOP_PREFIX”而不是“HADOOP_HOME”，但仍然是相同的错误。
我的hadoop目录中有此文件夹，
maziyar@maziyar-Lenovo-IdeaPad-U300s:/usr/local/hadoop$ ls -lha
total 20K
drwxr-xr-x 5 hduser hadoop 4.0K May 30 15:25 .
drwxr-xr-x 12 root root 4.0K May 30 15:25 ..
drwxr-xr-x 4 hduser hadoop 4.0K May 30 15:25 etc
drwxr-xr-x 12 hduser hadoop 4.0K Jun 4 21:29 usr
drwxr-xr-x 4 hduser hadoop 4.0K May 30 15:25 var
我上周下载了最新版本的apache-hadoop:hadoop-1.1.2-1.i386.rpm
最佳答案
我尝试在export HADOOP_HOME_WARN_SUPPRESS="TRUE"文件中设置conf/hadoop-env.sh，但警告消失了。虽然，我仍然不确定为什么这个警告排在第一位。