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Screencast : Switching from vendor JDK 1.4.2 to SAP JVM 4.

Requirement :  You want to replace the vendor JDK 1.4.2 of your SAP system with the SAP JVM 4. Since October 2012, SAP no longer support third party JAVA JVM/JDK for SAP Netweaver  04 , 04S and WAS 640 systems. You have to switch from vendor JDK 1.4.2 to SAP JVM 4. We will be using SAP JVM  Switch tool to perform this migration from vendor JDK to SAP JVM.

Steps :
1. Download required files form SAP Service market place. Following two software archives are required for the switch to the SAP JVM 4 ( SAP Note : 1555341)
• SAPJVMSWITCH<version>.SAR
(Path : SAP Service Market Place ->SAP Technology Components -> SAP JVM 4.1 -> SAP JVM SWITCH TOOL 1.0 -> Support Package Patches -> <OS version> -> and download the latest level)
• SAPJVM4<version>.SAR
(Path : SAP Service Market Place -> SAP Technology Components -> SAP JVM 4.1-> Support Package Patches -> <OS version> -> and download the latest level)
2. Extract SAPJVMSWITCH<version>.SAR using SIDADM user and launch SAPINST from it using ROOT user.
3. Follow SAPINST screen instructions to migrate.

SAP Switch tool Screen 1

SAP Switch tool Screen 2

SAP Switch tool Screen 3

SAP Switch tool Screen 4

Update the JVM parameter for following nodes
SAP Switch tool Screen 5

SAP Switch tool Screen 6
SAP Switch tool Screen 7
SAP Switch tool Screen 8

SAP Switch tool Screen 19
SAP JVM Switch tool parameter verification

SAP JVM Switch tool confirmation

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Verification :

1. Log into SAP System information page http://<SAP Hostname>:5<XX>00/sap/monitoring/SystemInfo and verify the version. 
SAP System information JVM version

2. Verify the environment variable JAVA_HOME in your system. For UNIX based systems it would be in .j2eeenv.sh file (present in the home directory of SIDADM user). 
SAP JAVA_HOME environment variable in UNIX


Reference :
Note 1665953 - SAP JVM Switch Tool Composite Note
Note 1555341 - Downloading SAP JVM Switch Tool and SAPJVM 4
723909 - Java VM settings for J2EE 6.40/7.0
718901 - How to Change the JDK of the J2EE Engine
Note 718901 - How to Change the JDK of the J2EE Engine
Note 723909 - Java VM settings for J2EE 6.40/7.0
Note 1495160 - SAP JVM as replacement for Partner JDKs 1.4.2
http://scn.sap.com/community/netweaver-administrator/blog/2012/06/06/sap-jvm-switch-guide-with-screenshot

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