HI i was trying to install hadoop but i get these error Format HDFS Namenode Error Could not find or load main class -Djava library path home hadoop hadoop-3 2 1 lib

Question

I have tried the answers I found on these sites but so far nothing seems to work. The same error keeps appearing.

Answer 1

Hi@bezz,

Hadoop builds on top of Java. So first check in your system Java is present or not. After Java installation, you need to set JAVA_HOME & PATH. Try to set these variables in .bashrc file. You can use the below-given command to find your JAVA_HOME & PATH.

$ which java

Also, change the value of HADOOP_OPTS as given below.

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/"

In your hadoop-env.sh file export the value of HADOOP_CONF_DIR. Hadoop internally searches these variables and if it finds different values, it may give an error.

Comments

Hi, I have done all that but i still get the same error.

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Hey, @Bezz,

Have you tried the solution which is mentioned by @MD?