name node formatting HDFS file not found error in Hadoop2.4.0

Question

All methods in my business logic return the same class type. That class has 3 properties: a success\fail boolean, and 2 dynamic properties(1 for fail result and 1 for success result). How can I decouple this business logic, if both my main API and the business logic need to know about this custom class?

Solution

First, check whether JAVA_HOME is set correctly in .bashrc file. Use echo $JAVA_HOME to check whether it is set or not. If not, set it using

export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64

Note: After making changes to .bashrc file, you'll need to reload it either by logging out and back in or by using . ~/.bashrc as pointed out in "How do I reload .bashrc without logging out and back in?".

It seems like the JAVA_HOME variable is incorrectly set in your hadoop-env.sh. Set JAVA_HOME to /usr/lib/jvm/java-7-openjdk-amd64 instead of usr/jvm/java-7-openjdk-amd64. as it is set currently (pointed out by the error).

Use

export JAVA_HOME="/usr/lib/jvm/java-7-openjdk-amd64"

in your hadoop-env.sh file.

Comments

[Alaa Ali]

What's the output of echo $JAVA_HOME; ls $JAVA_HOME; grep JAVA /usr/local/hadoop/etc/hadoop/hadoop-env.sh?