JAVA not in path although JAVA_HOME set

Question

I have set all the requirement variables in the /etc/profile but when launching elasticsearch, it is still not find Java. How i can set the environment variable. That's my /etc/profile

PATH=$PATH:$HOME/bin
APPLICATIONS=$HOME/Applications
JAVA_HOME=$APPLICATIONS/jdk1.7.0_79
PATH=$JAVA_HOME/bin:$PATH

export APPLICATIONS
export JAVA_HOME
export PATH

Output of commands

[root@87500e63467f Applications]# echo $PATH
/root/Applications/jdk1.7.0_79/bin:/root/Applications/jdk1.7.0_79/bin:/root/Applications/jdk1.7.0_79/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/bin:/root/bin
[root@87500e63467f Applications]# echo $JAVA_HOME
/root/Applications/jdk1.7.0_79
[root@87500e63467f Applications]# java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)
error: "Read-only file system" setting key "vm.max_map_count"
Starting elasticsearch: which: no java in (/sbin:/usr/sbin:/bin:/usr/bin)
Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME
                                                           [FAILED]

in the error, it says that ""Starting elasticsearch: which: no java in (/sbin:/usr/sbin:/bin:/usr/bin)"", it means really java isn't in that path, but how come when I echo $PATH, it shows that the java is in the path ?

Answer 1

After reading the docs from ElasticSearch, I found that if you're running on Ubuntu or Debian, the package only ships with the OpenJDK because of licensing issues. To fix this Java path problem, I installed the following after installing ElasticSearch (as directed by the docs):

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
java -version

Then upon running sudo service elasticsearch start everything worked and I had no more Java path issues.

Answer 2

run the command

java -XshowSettings

search the entry java.home = /usr/java/jdk1.8.0_91/jre

export the java_home in your bash profile

export JAVA_HOME=/usr/java/jdk1.8.0_91/jre

or in /etc/profile to expand to all users

Answer 3

Specifically for OpenBSD6.0, add

export JAVA_HOME=/usr/local/jdk-1.8.0/

to your .profile.

This specific version of the jdk, and possibly the basic path itself is subject to change in subsequent and previous versions of OpenBSD, you have been warned.

Answer 4

To get it going - though not nice - you could setup a symbolic link to your java in /usr/bin (which is listed by elasticsearch to be seen):

ln -s /root/Applications/jdk1.7.0_79/bin/java /usr/bin/java