CODEWITHSUNDEEP
javaubuntuhadoop
AlwaysALearner
AlwaysALearner

Reputation: 6690

Java and Hadoop apparently not properly installed

I am new to Hadoop, setting up my environment for the first time ever in Ubuntu 18.10

I downloaded jdk-8u101-linux-i586.tar.gz, jre-8u101-linux-i586.tar.gz and `hadoop-2.7.3.tar.gz and extracted them respectively with this command in my custom locations.

tar -xvf jdk-8u101-linux-i586.tar.gz
tar -xvf jre-8u101-linux-i586.tar.gz
tar -xvf hadoop-2.7.3.tar.gz

I then updated ~/.bashrc file by appending the following information using gedit-

export HADOOP_HOME=/home/hduser/HadoopPOC/hadoop-2.7.3
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export PATH=$PATH:$HADOOP_HOME/bin

# Set JAVA_HOME

export JAVA_HOME=/home/hduser/HadoopPOC/JAVA/jdk1.8.0_101
export PATH=$JAVA_HOME/bin:$PATH

I then ran source .bashrc command and then logged out of my account and logged back in.

But I cannot determine if Java and Hadoop have been properly installed. I get these errors-

hduser@hduser-HP-Pavilion-g7-Notebook-PC:~/HadoopPOC/JAVA/jdk1.8.0_101/bin$ java -version
bash: /home/hduser/HadoopPOC/JAVA/jdk1.8.0_101/bin/java: No such file or directory

hduser@hduser-HP-Pavilion-g7-Notebook-PC:~/HadoopPOC/JAVA/jdk1.8.0_101/bin$ hadoop version
/home/hduser/HadoopPOC/hadoop-2.7.3/bin/hadoop: line 166: /home/hduser/HadoopPOC/JAVA/jdk1.8.0_101/bin/java: No such file or directory

I did ls on $JAVA_HOME/bin and noticed that java exists.

enter image description here

Upvotes: 0

Views: 81

Answers (2)

AlwaysALearner
AlwaysALearner

Reputation: 6690

I had installed a 32-bit java in a 64-bit machine, which is why it didn't work. Now I've installed a 64-bit jdk and it recognises java -version

Upvotes: 0

GMc
GMc

Reputation: 1774

Is the java command in /home/hadoopPOC/JAVA/jdk1.8.0_101/bin?

Given the variables you specified above, that is where your system will look for it. What does ls -l /home/hadoopPOC/JAVA/jdk1.8.0_101/bin show you?

As you indicated in the Q&A, the paths were incorrect.

Re the new question, it has hard to tell without seeing the details. Probably it is a similar issue - the path specified (/home/hduser/HadoopPOC/JAVA/jdk1.8.0_101/bin/java) does not exist.

Upvotes: 1

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