Downgrading JDK of a remote Solaris to install WebLogic Server 10.0

Question

Hello all,
I've been assigned a virtual machine at my intern that needs WebLogic installed on it as part of my training. While going through WebLogic 10.0 compatibility notes in the Oracle website I have found that it requirea a 1.5 JDK while the Solaris machine is running the following:
Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
Java HotSpot(TM) Server VM (build 17.0-b16, mixed mode)
It's 1.6. And apparently I need to downgrade since, from what I've read, WebLogic Server 10.0 is only compatible with JDK 1.5 (5.0 and later).
The machine has the following specifications:
# uname -a && cat /etc/*release
SunOS ELSOLT01 5.10 Generic_142910-17 i86pc i386 i86pc
Oracle Solaris 10 9/10 s10x_u9wos_14a X86
Could someone who has encountered a similar problem give me a few pointers on how to downgrade a remote machine using SSH? I have .sh and .tar files of JDK 1.5
Much appreciated.

Answer 1

"...only compatible with JDK 1.5 (5.0 and later)."
I think this would include 1.6 too (5 and later).
If you want to use another Java version with WebLogic you have to adjust the setDomainEnv.sh.
Note that when you install WebLogic, you only have software there is not yet any runtime.
What you do is from this software you create a domain (which is still software). When you create
a domain, there is also a setDomainEnv.sh file create. In this file you find the following entries:
WL_HOME="/location/wlserver_10.3"
export WL_HOME
BEA_JAVA_HOME="/location/jrockit_160_24_D1.1.2-4"
export BEA_JAVA_HOME
SUN_JAVA_HOME="/location/some_version_of_the_JDK"
export SUN_JAVA_HOME
# added JAVA_VENDOR property
JAVA_VENDOR="Oracle"
export JAVA_VENDOR
# added USER_MEM_ARGS, which override the memory settings
# the following shows a JRockit example
USER_MEM_ARGS="-Xms512m -Xmx512m -Xns256m -XXkeepAreaRatio:25 -Xgcprio:pausetime -XpauseTarget:200ms"
export USER_MEM_ARGS
# the following shows a (Sun) HotSpot example
#USER_MEM_ARGS="-Xmx512m -Xms512m -Xmn256m -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=31 -XX:PermSize=128m -XX:MaxPermSize=128m -XX:+UseConcMarkSweepGC"
#export USER_MEM_ARGS
if [ "${JAVA_VENDOR}" = "Oracle" ] ; then
     JAVA_HOME="${BEA_JAVA_HOME}"
     export JAVA_HOME
else
     if [ "${JAVA_VENDOR}" = "Sun" ] ; then
          JAVA_HOME="${SUN_JAVA_HOME}"
          export JAVA_HOME
     else
          JAVA_VENDOR="Oracle"
          export JAVA_VENDOR
          JAVA_HOME="C:/bea/jrockit_160_24_D1.1.2-4"
          export JAVA_HOME
     fi
fi
# We need to reset the value of JAVA_HOME to get it shortened AND
# we can not shorten it above because immediate variable expansion will blank it
JAVA_HOME="${JAVA_HOME}"
export JAVA_HOMEBy letting the JAVA_HOME point to the right directory you can alter the JVM with which WebLogic runs.
The setDomainEnv.sh file is located in the <middleware-home>/user_projects/domains/<domain-name>/bin directory.
Copy the new JDK files to the Solaris machine (you could probably also you something like winscp (http://winscp.net/eng/index.php) when
you copy the files from a Windows machine).
Install the JDK (usually a JDK to be installed on Solaris constists of two steps install 32bits than install 64 bits)