Ubuntu – Multiple JDK is not working properly in Ubuntu 14.04

14.04javajdk

JDK versions (jdk1.7.0_21 and jdk1.7.0_55)

Installed and Configured like below.

jdk1.7.0_21

update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_21/bin/java" 1

update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_21/bin/javac" 1

update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0_21/bin/javaws" 1

sudo chmod a+x /usr/bin/java 
sudo chmod a+x /usr/bin/javac 
sudo chmod a+x /usr/bin/javaws
sudo chown -R root:root /usr/lib/jvm/jdk1.7.0_21

jdk1.7.0_55

update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_55/bin/java" 1

update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_55/bin/javac" 1

update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0_55/bin/javaws" 1
sudo chmod a+x /usr/bin/java 
sudo chmod a+x /usr/bin/javac 
sudo chmod a+x /usr/bin/javaws
sudo chown -R root:root /usr/lib/jvm/jdk1.7.0_55

and i am choosing/changing the default JDK by

update-alternatives --config java
update-alternatives --config javac
update-alternatives --config javaws

After this if i run java -version while jdk1.7.0_55 is default, output's like below.

root@ssa-lpt:/usr/lib/jvm# java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)

but while jdk1.7.0_21 is default it gives an message like

java: error while loading shared libraries: libjli.so: cannot open
shared object file: No such file or directory

If i issue: locate libjli.so

/usr/lib/jvm/jdk1.7.0_55/jre/lib/amd64/jli/libjli.so
/usr/lib/jvm/jdk1.7.0_55/lib/amd64/jli/libjli.so

So it's clear that though i selected jdk1.7.0_21 but somehow it's still pointing to jdk1.7.0_55

Tried to rename the jdk1.7.0_55 but no luck.

Not sure how to fix this. Thanks in advance for your help 🙂

Solution:: My jdk1.7.0_21 was broken downloaded a fresh copy form oracle untar it in /usr/lib/jvm/ that was it.

Best Answer

There is too much reasons why you can see this error.

Could you please run all this commands one by one, and post output here:

  1. file /usr/bin/java
  2. type /usr/bin/java
  3. echo $JAVA_HOME
  4. echo $PATH
  5. ls -ahl /usr/lib/jvm

Then - using update-alternatives choose jdk1.7.0_55 and run this

$ ldd $(which java)

using update-alternatives choose jdk1.7.0_21 and run this

$ ldd $(which java)

then again for jdk1.7.0_21 run this

$ sudo java -version

UPDATE. Answer

For everyone who has same problem:

First of all, run sudo ldconfig. It is safe to run ldconfig at any time

After a long discussion we concluded that jdk1.7.0_21 is corrupted.

How we determine it:

  1. When choose java jdk1.7.0_21, sudo java -version give error even if run as root.
  2. find /usr/lib/jvm -name "libjli.so", this command must show that libjli is located in folder where jdk1.7.0_21 installed. In our case it was not.

In other cases:

Check that jdk belongs to root:root

Check that /usr/bin/java is a symlink, not executable.

Check PATH, java should not be in the PATH, if you are using update-alternatives.

Also here is helpful links:

https://unix.stackexchange.com/questions/16656/problem-to-launch-java-at-debian-error-while-loading-shared-libraries-libjli

https://www.centos.org/forums/viewtopic.php?t=16398

https://superuser.com/questions/310371/problem-launch-java-on-debian-error-while-loading-shared-libraries-libjli-so

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