$HADOOP_HOME is deprecated ,Hadoop

Question

I tried to install Hadoop on a single node cluster (my own labtop-ubuntu 12.04). I followed this tutorial and checked it line by line two times . http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

everything seems correct. I set all the core-site.xml ,mapred-site.xml ,hdfs-site.xml .

when I run the following command in hduser su :

hduser@maziyar-Lenovo-IdeaPad-U300s:~$ /usr/local/hadoop/usr/sbin/start-all.sh

I get the following errors :

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

I added the export HADOOP_HOME_WARN_SUPPRESS="TRUE" into hadoop-env.sh and still same error.

On the file /home/hduser/.bashrc where I guess my error comming from I have :

# 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

I added /usr/sbin as a bin directory because start-all.sh and commands are there.

I also tried "HADOOP_PREFIX" instead of "HADOOP_HOME" in bashrc file but still the same error.

I have this folders in my hadoop directory ,

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

I downloaded the latest version of apache-hadoop last week: hadoop-1.1.2-1.i386.rpm

Answer 1

I tried setting export HADOOP_HOME_WARN_SUPPRESS="TRUE" in my conf/hadoop-env.sh file and the warning vanished. Although, I am still unsure of why this warning came in first place.