OpenTSDB no JDK found

I'm having troubles starting OpenTSDB because no JDK is found allthough I've installed it and set JAVA_HOME. Here's what I've done:

1. Install JDK

sudo apt-get install openjdk-8-jdk

2. Set JAVA_HOME

I tried setting JAVA_HOME in 2 different ways:

1. Add JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64" to /etc/environment
2. Add export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64" to .bashrc

3. Download OpenTSDB

wget https://github.com/OpenTSDB/opentsdb/releases/download/v2.3.0/opentsdb-2.3.0_all.deb

4. Install OpenTSDB

dpkg -i opentsdb-2.3.0_all.deb

5. Start OpenTSDB

service opentsdb start

Each time I get the error "* no JDK found - please set JAVA_HOME". I've tried numerous times, what am I doing wrong?

This issue is also present in opentsdb 2.3.1. To fix this issue you should explicitly write your JAVA_HOME to the opentsdb init script (at /etc/init.d/opentsdb)

open the file /etc/init.d/opentsdb and add the path to your java installation

here is the fix:

JDK_DIRS=" Path_to_your_JDK_here  \
  /usr/lib/jvm/java-8-oracle /usr/lib/jvm/java-8-openjdk \
  /usr/lib/jvm/java-8-openjdk-amd64/ /usr/lib/jvm/java-8-openjdk-i386/ \
        \
  /usr/lib/jvm/java-7-oracle /usr/lib/jvm/java-7-openjdk \
  /usr/lib/jvm/java-7-openjdk-amd64/ /usr/lib/jvm/java-7-openjdk-i386/ \
        \
  /usr/lib/jvm/default-java"