How do I set JAVA_HOME on JDK location?

yuri16 · 01-28-2009, 02:49 AM

I already exported JAVA_HOME to the directory of jdk

Code:

export JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun

but when I tried mvn --version to test if the Apache maven was successfully installed, I got this error message:

Code:

Error: JAVA_HOME is not defined correctly.
  We cannot execute /usr/share/doc/sun-java5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME/bin/java

Is there something wrong that I did?

Any help will be very much appreciated.

Agrouf · 01-28-2009, 03:00 AM

what is this mvn you are executing?
Obviously, it is setting its own JAVA_HOME.

yuri16 · 01-28-2009, 03:11 AM

Quote:

Originally Posted by Agrouf

what is this mvn you are executing?
Obviously, it is setting its own JAVA_HOME.

That was the installation process of Apache Maven.

Let me tell you the instructions:

1. Extract the distribution archive, i.e. apache-maven-2.0.9-bin.tar.gz to the directory you wish to install Maven 2.0.9. These instructions assume you chose /usr/local/apache-maven. The subdirectory apache-maven-2.0.9 will be created from the archive.
2. In a command terminal, add the M2_HOME environment variable, e.g. export M2_HOME=/usr/local/apache-maven/apache-maven-2.0.9.
3. Add the M2 environment variable, e.g. export M2=$M2_HOME/bin.
4. Optional: Add the MAVEN_OPTS environment variable to specify JVM properties, e.g. export MAVEN_OPTS="-Xms256m -Xmx512m". This environment variable can be used to supply extra options to Maven.
5. Add M2 environment variable to your path, e.g. export PATH=$M2:$PATH.
6. Make sure that JAVA_HOME is set to the location of your JDK, e.g. export JAVA_HOME=/usr/java/jdk1.5.0_02 and that $JAVA_HOME/bin is in your PATH environment variable.
7. Run mvn --version to verify that it is correctly installed.

Can you tell me the correct way to set JAVA_HOME and so as the PATH? Coz I'm really confused. Thank you so much.

Didier Spaier · 01-28-2009, 03:11 AM

Something should be wrong in your apache-maven installation:

Code:

bash-3.1# /opt/apache-maven/bin/mvn --version
Maven version: 2.0.9
Java version: 1.6.0_11
OS name: "linux" version: "2.6.27.7-smp" arch: "i386" Family: "unix"
bash-3.1#

Code:

bash-3.1$ set|grep JAVA
JAVA_HOME=/usr/lib/java
bash-3.1$

yuri16 · 01-28-2009, 03:23 AM

[QUOTE=Didier Spaier;3423745]Something should be wrong in your apache-maven installation:

Code:

bash-3.1# /opt/apache-maven/bin/mvn --version
Maven version: 2.0.9
Java version: 1.6.0_11
OS name: "linux" version: "2.6.27.7-smp" arch: "i386" Family: "unix"
bash-3.1#

When I tried the command below it says "No such file or directory". The Apache Maven was located on /usr/local/apache-maven-2.0.9

Code:

/opt/apache-maven/bin/mvn --version

The things is, the JAVA_HOME was located on /usr/share/doc/sun-java5-jre which I think it should be located on where jdk is (if I'm not mistaken). The jdk was located on /usr/lib/jvm/java-1.5.0-sun

Didier Spaier · 01-28-2009, 03:44 AM

I am wondering:
- why do you need Apache maven ? What do you intend to do with it ?
- why didn't you get it as a package for your distribution ?
- (take no offense) knowing that you don't know how to export a BASH environment variable neither how-to include a path in your PATH environment variable, how are you going to effectively use Apache maven ?

I issued following command: '/opt/apache-maven/bin/mvn --version' because I knew where the 'mvn' program was on *my* system.

Otherwise please send output of : 'set|grep JAVA' and 'echo $PATH' commands (typed without the quotes).

yuri16 · 01-28-2009, 03:56 AM

I'm sorry, honestly it was my first time to use linux commands so please bear with me. I need to install Apache Maven because it was a required software for the portal server.

Anyway, here are the outputs:

Code:

gridport:~# set|grep JAVA
JAVA_HOME=/usr/share/doc/sun-java5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME5-jre/JAVA_HOME
_=JAVA_HOME

Code:

gridport:~# echo $PATH
/usr/local/apache-maven-2.0.9/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/java/jdk1.5.0_07/bin

jay73 · 01-28-2009, 04:12 AM

It would be helpful if you mentioned the type of distribution you are using. Many of the ones that come with a package manager will set up the path automatically and can install maven from their repositories.

yuri16 · 01-28-2009, 04:15 AM

Quote:

Originally Posted by jay73

It would be helpful if you mentioned the type of distribution you are using. Many of the ones that come with a package manager will set up the path automatically and can install maven from their repositories.

I'm using Debian.
I am installing Debian-based portal server which requires me to install Apache Maven first before to go through the portal installation.

jay73 · 01-28-2009, 04:17 AM

Right, Debian should have maven. But how did you install java, not manually I hope?

yuri16 · 01-28-2009, 04:28 AM

Quote:

Originally Posted by jay73

Right, Debian should have maven. But how did you install java, not manually I hope?

I used "apt-get install sun-java5-jdk"

jay73 · 01-28-2009, 05:11 AM

OK, now install maven using apt-get install maven2. You may want to check first whether it is actually available (command = aptitude search maven) but I can hardly imagine that it is not.
You may need to remove the paths that you set manually; unless you have a different jdk as your default, installing jdk5 should have taken care of this part.

Agrouf · 01-28-2009, 07:04 AM

Actually, when you export JAVA_HOME, you must do it in the same terminal as the one where you launch mvn

yuri16 · 01-28-2009, 09:29 PM

Quote:

Originally Posted by jay73

OK, now install maven using apt-get install maven2. You may want to check first whether it is actually available (command = aptitude search maven) but I can hardly imagine that it is not.
You may need to remove the paths that you set manually; unless you have a different jdk as your default, installing jdk5 should have taken care of this part.

I don't know how to recover the changes I made in /etc/profile.
I really had a wrong move..so now when I used "vi /etc/profile",
I got this:

Code:

E325: ATTENTION
Found a swap file by the name "/etc/.profile.swp"
          owned by: root   dated: Wed Jan 28 11:53:05 2009
         file name: /etc/profile
          modified: YES
         user name: root   host name: gridport.psigrid.gov.ph
        process ID: 23578
While opening file "/etc/profile"
             dated: Wed Jan 28 17:15:53 2009
      NEWER than swap file!

(1) Another program may be editing the same file.
    If this is the case, be careful not to end up with two
    different instances of the same file when making changes.
    Quit, or continue with caution.

(2) An edit session for this file crashed.
    If this is the case, use ":recover" or "vim -r /etc/profile"
    to recover the changes (see ":help recovery").
    If you did this already, delete the swap file "/etc/.profile.swp"
    to avoid this message.
"/etc/profile" 67 lines, 605 characters
Press ENTER or type command to continue

Code:

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ "`id -u`" -eq 0 ]; then
  PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
else
  PATH="/usr/local/bin:/usr/bin:/bin:/usr/games"
fi

if [ "$PS1" ]; then
  if [ "$BASH" ]; then
    PS1='\u@\h:\w\$ '
  else
    if [ "`id -u`" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

export PATH

unmask 022

On which part of the above script I'll going to add for the setting up of JAVA_HOME??

I'm very confused. I'm really new to this.

jay73 · 01-29-2009, 01:29 AM

You just add your export JAVA_HOME to the bottom of /etc/profile. As for the first excerpt you posted, that is the message you would get if your vim session crashed. It tells you that a copy of the original file has been made and that you need to decide what to do with it. See the information under (2) in the message.