I installed java8 with brew install --cask adoptopenjdk/openjdk/adoptopenjdk8 but i think i messed things up,
when i type echo $JAVA_HOME it gives /usr/bin/java
when i type java -version it gives java version "1.8.0_311" Java(TM) SE Runtime Environment (build 1.8.0_311-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.311-b11, mixed mode)
when i type /usr/libexec/java_home it gives /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
when i try to run hadoop everything starts except namenode.
when i type namenode -format after start-all.sh it gives this error:
ERROR: JAVA_HOME /usr/local/opt/openjdk does not exist.
My hadoop-env.sh in /etc/hadoop/
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Answer
ensure you JAVA_HOME is set in /etc/hadoop/conf/hadoop-env.sh.
in you ~/.bash_profile add the following:
export JAVA_HOME=$<your java install path>
check this post on actual install path of Java when using brew: java’s path still /usr/bin/java after brew cask install java
do this in hadoop-env.sh :
JAVA_HOME=<your java install path> export JAVA_HOME