JDK upgrade in Oracle EBS 12.1.3

Aim : 

The aim of this post is to detail the steps of JDK upgrade in EBS 12.1.3.

Steps:

1) Download and install the following patches:
Patch 16545472:R12.OAM.B
Patch 17309237:R12.TXK.B
Patch 16496713:R12.POS.B

2) Download latest version of JDK that we are planning to upgrade to. (In our case, plan is to upgrade to JDK 1.7.0_271.

We can download JDK 1.7.0_271 using the patch#31311341 from Oracle Support site.

3) Stop all application services using adstpall.sh apps/apps

4) Copy the JDK to below location:

cd $IAS_ORACLE_HOME
mv jdk jdk_07082020
mv jdk1.7.0_271 jdk

cd $IAS_ORACLE_HOME/appsutil
mv jdk jdk_07082020
mv jdk1.7.0_271 jdk

5) Rename JRE 1.4.2 as it would not be required:

cd $IAS_ORACLE_HOME/jre
mv 1.4.2 1.4.2_old 

6) Copy the albony font file:

cp $FND_TOP/resource/font_file_name.ttf $IAS_ORACLE_HOME/appsutil/jdk/jre/lib/fonts

7) Download and Apply Patch 12848228 and 5659594

Apply Patch 12848228 and Patch 5659594 to your 10.1.2.3 Oracle Home using Opatch.

8) Copy JDK to 10.1.2 Home

cd $ORACLE_HOME
mv jdk jdk_old
mv jdk1.7.0_2 jdk 

9) Rename JRE 1.4.2 under 10.1.2 Home

mv $ORACLE_HOME/jdk64 $ORACLE_HOME/jdk64_old /* if there is such */
mv $ORACLE_HOME/jre/1.4.2 $ORACLE_HOME/jre/1.4.2_old
mv $ORACLE_HOME/jre/1.4.2 $ORACLE_HOME/jre/1.4.2_old

10) Apply Below Patches to 10.1.2 Home:

Patch 16271876 - (apply this patch first)
Patch 17907988 - (apply this patch befor the Forms patch 17653437)
Patch 17653437 - Forms Patch
Patch 17645157 - Reports Patch
Patch 16241466  - Proc Patch

11) Relink the forms and reports

$INST_TOP/ora/10.1.2
Souce the env file

cd $ORACLE_HOME/forms/lib32
make -f ins_forms.mk sharedlib install

cd $ORACLE_HOME/reports/lib
make -f ins_reports.mk install

Run ADAdmin and select the Forms and Reports regeneration.

12) Start all Application services using adstrtal.sh apps/apps