Jenkins - Ubuntu: Unable to locate package openjdk-8-jre-headless
I have Jenkins running on my Ubuntu 14.04, and i am trying to do upgrade for jenkins using normal apt-get install jenkins, but when i try to do it, i keep getting the error.
Found an incorrect Java version
Java version found:
java version "1.7.0_131"
OpenJDK Runtime Environment (IcedTea 2.6.9) (7u131-2.6.9-0ubuntu0.14.04.2)
OpenJDK 64-Bit Server VM (build 24.131-b00, mixed mode)
Aborting
invoke-rc.d: initscript jenkins, action "start" failed.
dpkg: error processing package jenkins (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
jenkins
E: Sub-process /usr/bin/dpkg returned an error code (1)
Solution
I’m using Java 7, but Jenkins needs Java 8.You need JDK 8 to run jenkins.
If i run this i got another error
root@vagrant-ubuntu-trusty-64:/home/vagrant# sudo apt install openjdk-8-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openjdk-8-jre-headless
Add the webupd8 repo to your system:
sudo add-apt-repository ppa:webupd8team/java
sudo -E add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk
You can also install multiple version of jdk, mixing openjdk and oracle versions. Then you can use the command update-java-alternatives to switch between installed version:
# list available jdk
update-java-alternatives --list
# use jdk7
sudo update-java-alternatives --set java-7-oracle
# use jdk8
sudo update-java-alternatives --set java-8-oracle
how to switch between different versions
run the follwing command from the terminal:
sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 auto mode
1 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 manual mode
* 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1069 manual mode
-
Press enter to keep the current choice[*], or type selection number: As you can see I’m running open jdk 8.
-
To switch to to jdk 7, press 1 and hit the Enter key. Do the same for javac as well with,
sudo update-alternatives --config javac.
Check versions to confirm the change:
java -version and javac -version.