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I am trying to install ApproxMapreduce on Hadoop 3.0.0 on my Mac. And I followed the instructions from this link that worked for Hadoop 1.1.2. https://github.com/goiri/ApproxHadoop

And I got an error message saying: 

Error: `JAVA_HOME` is not defined correctly.
  We cannot execute /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java/bin/java

While I set my JAVA_HOME path when I installed Hadoop. What should I change in order to get the ApproxMapreduce work? I've set the JAVA_HOME to my java home directory and it's not working.

Gyanendra Dwivedi
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JDDD
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  • `JavaAppletPlugin` is not where Java is installed... See https://www.mkyong.com/java/how-to-set-java_home-environment-variable-on-mac-os-x/ Also, if wouldn't really recommend running that code with Hadoop 3 since it's not been updated in 3 years – OneCricketeer Mar 18 '18 at 03:54
  • @cricket_007 I am trying to run an ApproxHadoop K means application on my Hadoop3.0.0. And I can't find any related resources. Do you have any resources? Thanks! – JDDD Mar 19 '18 at 22:19
  • Nope. I have not needed to run MapReduce code in years. Your error is not related to Hadoop anyway. Your JAVA_HOME variable is not configured correctly in `hadoop-env.sh` – OneCricketeer Mar 19 '18 at 22:45
  • @cricket_007 I've changed my hadoop-env.sh to what shown below: **# Extra Java runtime options for all Hadoop commands. We don't support # IPv6 yet/still, so by default the preference is set to IPv4. export HADOOP_OPTS="-Djava.net.preferIPv4Stack=true -Djava.security.krb5.realm= -Djava.security.krb5.kdc=" export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home"** – JDDD Mar 20 '18 at 23:32
  • And it's not working – JDDD Mar 20 '18 at 23:39
  • Hadoop doesn't support Java 9. And if you are not using Kerberos, then lose the krb5 properties – OneCricketeer Mar 21 '18 at 01:33

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