Finding and uninstalling older Java RPM packages

Find the Java JDK / SDK / JRE packages, which might influence with the installation of the new package installation:

rpm -qa | grep -i java

Uninstall the needed packages:

rpm -e <package name>

Updating an existing Java installation

First install the newer IBM Java package:

rpm -ivh <package file>

Installing DB2 via db2setup with a newer IBM Java

1. Set the following environment variables:

export DB2USELOCALJRE=TRUE
export JAVA_HOME=
(e.g.: export JAVA_HOME=/opt/IBMJava2-142)

2. Launch db2setup from the same shell

Updating the instance database manager

Note: Only necessary if an instance exists on the system.

Identify all instances with the same bitness as the newly installed Java package. Update the database manager configuration for each DB2 instance to use this kit instead of the default value.

Then update the database manager configuration for each DB2 instance to use this kit instead of the default value.

e.g.: db2 update dbm cfg using JDK_PATH /opt/IBMJava2-142

The path specified in this example is the base installation folder of the installed Java 1.4.2 package. If different from above this can be found out by listing the content of the installed Java package:

rpm -ql <package name>