java not working

[gilli.livi]

hi,

I have Fedora 12 and Windows 7 in a dual boot configuration in my lenovo laptop.
The config of my laptop is core2duo 1.73, 3gb ram and 160gb hdd.

My java was working properly till now. I used to start JDownloader by using "java -jar JDowloader.jar". But now it is showing "command not found"

[root@electron ~]# java -jar /root/.jd/JDownloader.jar 
bash: java: command not found

[root@electron ~]# which java
/usr/bin/which: no java in (/usr/lib/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/games:/usr/local/sbin:/usr/sbin:/sbin:/opt/real/RealPlayer:/home/livingstone/bin:/opt/real/RealPlayer:/opt/real/RealPlayer)

[root@electron ~]# echo $PATH
/usr/lib/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/games:/usr/local/sbin:/usr/sbin:/sbin:/opt/real/RealPlayer:/home/livingstone/bin:/opt/real/RealPlayer:/opt/real/RealPlayer

[root@electron ~]# ls /usr/bin/java -l
lrwxrwxrwx 1 root root 22 2010-02-27 02:09 /usr/bin/java -> /etc/alternatives/java

The output of the "ls /usr/bin/java -l" had "/usr/bin/java" in red and "/etc/alternatives/java" in blinking red

I tried reinstalling java using the following command

yum reinstall java -y

But the problem persists. Any idea what the problem could be? Should I add anything more to the $PATH variable?

[Hlingler]

The output of the "ls /usr/bin/java -l" had "/usr/bin/java" in red and "/etc/alternatives/java" in blinking red

Indicates a busted sym-link. Fix it.

V

[gilli.livi]

I dont know how to fix the symlink because after few redirections the destination file is not found. I have shown it below. The path in the right side of the "->" was blinking in red

[root@electron ~]# ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2010-02-27 02:09 /usr/bin/java -> /etc/alternatives/java
[root@electron ~]# ls -l /etc/alternatives/java
lrwxrwxrwx 1 root root 26 2010-02-27 02:09 /etc/alternatives/java -> /usr/java/default/bin/java
[root@electron ~]# ls /usr/java/default/bin/java
ls: cannot access /usr/java/default/bin/java: No such file or directory

What should I do now?

[PabloTwo]

Assuming you are using the Fedora 12 provided openjdk java, to reinstall:

yum reinstall java-1.6.0-openjdk

[Hlingler]

It appears that you had Sun Java installed at one time, and that the alternatives configurator was set to point to it, but now it's missing. Fix the alternatives config (assuming F12 as Paul says) by running (as root-user) the Alternatives Configurator.

V

[gilli.livi]

Thank you Pablo Two. I already tried "yum reinstall java". The package java-1.6.0-openjdk was reinstalled when I tried the previous command. But the problem persisted.

Thank you Hlinger. I ran galternatives(GUI frontend for alternatives) and there were multiple entries for java. I changed the one currently selected one for java from "/usr/java/default/bin/java" to "/usr/lib/jvm/jre-1.6.0-openjdk/bin/java". Now java is working.



Thank you guys for the help. Fedora Forum rocks.

[mmachado]

gilli,

could you help me providing me more info about how to use this aplication? Nothing I do solve my problem.

thanks,
Mateus

Thank you Pablo Two. I already tried "yum reinstall java". The package java-1.6.0-openjdk was reinstalled when I tried the previous command. But the problem persisted.

Thank you Hlinger. I ran galternatives(GUI frontend for alternatives) and there were multiple entries for java. I changed the one currently selected one for java from "/usr/java/default/bin/java" to "/usr/lib/jvm/jre-1.6.0-openjdk/bin/java". Now java is working.



Thank you guys for the help. Fedora Forum rocks.

[gilli.livi]

mateus,

do you have the same problem, i.e, the java binary is not found.
If so, did u try changing the options in galternatives? If that is not working, post the "ls -l <galternatives entry for java>" output for all the entries for java in galternatives.

Also this problem got solved, i.e., the links were set straight when i updated fedora

[mmachado]

hi gilli.livi,

I finnally found the solution out! I was going to reply this!
Well, It was very simple, although I could not see this before. I read many helps and nothing worked. I updated/reinstalled Java but It seems the solution was ONLY create a symbolic link in /usr/lib/mozilla/plugins/javaplugin_oji.so from the file in /usr/java/jreYOUR_VERSION/lib/i386/libnpjp2.so:

Creating the symbolic link:

sudo ln -s /usr/java/jre1.6.0_20/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins/javaplugin_oji.so

This simply solved my problem and It will do for every user. I trying do this in another paths like:
/usr/lib/firefox/plugins
/usr/lib/firefox-3.6/plugins
/home/USER/.mozilla/plugins
/home/USER/.mozilla/firefox/PROFILE/

But they didn't work.

My system operation is Fedora 10, 32bits.


anyway thank you very much!!!!,
Mateus

[Hlingler]

You apparently used the Sun Java self-extracting RPM. In which case the link should be:
sudo ln -s /usr/java/default/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins/javaplugin_oji.so

That way, if/when you update Java, the link won't break. /usr/java/default/ is itself an auto-generated link to the latest Java folder in /usr/java/ , created by a %postinstall script in the Java RPMs, exactly for this purpose.

V

P.S. Also: you guys missed the 'libjavaplugin.so' alternative item in the Alternatives Configurator (separate item from Java).

[mmachado]

Yeah, I didn't realized this. Better and definitive solution, yours.

thank you,
Mateus

You apparently used the Sun Java self-extracting RPM. In which case the link should be:
sudo ln -s /usr/java/default/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins/javaplugin_oji.so

That way, if/when you update Java, the link won't break. /usr/java/default/ is itself an auto-generated link to the latest Java folder in /usr/java/ , created by a %postinstall script in the Java RPMs, exactly for this purpose.

V