SUNScholar/Java Version 7

Introduction

DSpace versions => 4.2 require java version 7. Java version 7 is the default with Ubuntu 14.04 LTS, but not Ubuntu 12.04 LTS.

Follow the instructions below to install and setup java 7 as default on an Ubuntu 12.04 LTS server.

This should be done before you attempt to upgrade to DSpace 4.2.

Procedure

Install Java7

• Install Java 7

sudo apt-get install openjdk-7-jdk  openjdk-7-jre

• Remove default java symlink

sudo cd /usr/lib/jvm

sudo rm default-java

Select 64bit or 32bit

• Add new symlink depending on 32 or 64 bit architecture

sudo ln -s java-1.7.0-openjdk-amd64 default-java

or for a 32 bit server

sudo ln -s java-1.7.0-openjdk-i386 default-java

Select 64bit or 32bit

• Setup default java binaries depending on 32 or 64 bit architecture

sudo update-java-alternatives -s java-1.7.0-openjdk-amd64

or for a 32 bit server

sudo update-java-alternatives -s java-1.7.0-openjdk-i386

Post-installation checks

• Check java version

java -showversion

The following should display

java version "1.7.0_65"
OpenJDK Runtime Environment (IcedTea 2.5.3) (7u71-2.5.3-0ubuntu0.12.04.1)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

Restart Tomcat

• Restart the Tomcat6 server

sudo service tomcat6 restart