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Accepted
Hossein
Asked: 2012-06-24 03:33:45 +0800 CST

Specify JDK for tomcat7

  • 772

I have installed tomcat7 (using apt-get install) and whenever I want to start tomcat7 it says :

* no JDK found - please set JAVA_HOME

I have set JAVA_HOME in my bash.bashrc and also in ~/.bashrc and when I issue echo $JAVA_HOME I clearly see that this variable is pointing to my jdk's root folder. Can someone help me with this please?

Thanks

java

5 Answers

  1. Best Answer

    You can try this:

    Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.

    gksudo gedit /etc/default/tomcat7

    When the file opens, uncomment the line that sets the JAVA_HOME variable.

    enter image description here

    Save and restart tomcat7 server.

    • 80

  2. Tomcat will not actually use your JAVA_HOME environmente variable, but look in some predefined locations and in the JAVA_HOME variable set inside the startup script, as other answers point out. If you don't like messing with the tomcat startup script, you could create a symlink for your preferred java installation, which will be picked up by tomcat.

    For example:

    ln -s /usr/lib/jvm/java-8-oracle /usr/lib/jvm/default-java
    • 9

  3. Open terminal

    echo $JAVA_HOME

    Copy the result. Then

    sudo -H gedit /etc/default/tomcat7

    Replace #JAVA_HOME=/usr/lib/jvm/openjdk-6-jdk with the output you copied from $JAVA_HOME.

    • 5

  4. Just add following line in /etc/default/tomcat7 at where JAVA_HOME variable is defined

    JAVA_HOME=/usr/lib/jvm/java-7-oracle

    then run command

    sudo service tomcat7 restart
    • 2

  5. Adding to the answer of Mitch (the accepted answer above), check your /usr/lib/jvm/ directory. Usually, java is installed there itself.

    You might have oracle java installed or you might have a latest version of java installed. Just checkout the directories at /usr/lib/jvm/ and add the one your java is in.

    For me, it was:

    /usr/lib/jvm/java-8-oracle

    So, replace 

    #JAVA_HOME=/some/directory

    with

    #JAVA_HOME=/usr/lib/jvm/java-8-oracle

    did the job for me.

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