Server subsys tem failed. Reason: java.lang.UnsupportedClassVersionError

Question

Hello!
Is not possible to run WebLogic 10R3 with JAVA 5?
<24/Nov/2009 10H14m GMT> <Info> <WebLogicServer> <BEA-000377> <Starting WebLogic
Server with Java HotSpot(TM) Client VM Version 1.5.0_22-b03 from Sun Microsyste
ms Inc.>
<24/Nov/2009 10H14m GMT> <Critical> <WebLogicServer> <BEA-000386> <Server subsys
tem failed. Reason: java.lang.UnsupportedClassVersionError: Bad version number i
n .class file
java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
4)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at weblogic.kernel.FinalThreadLocalList.initialize(FinalThreadLocalList.
java:44)
at weblogic.t3.srvr.PreConfigBootService.start(PreConfigBootService.java
:70)
at weblogic.t3.srvr.ServerServicesManager.startService(ServerServicesMan
ager.java:459)
at weblogic.t3.srvr.ServerServicesManager.startInStandbyState(ServerServ
icesManager.java:164)
at weblogic.t3.srvr.T3Srvr.initializeStandby(T3Srvr.java:711)
at weblogic.t3.srvr.T3Srvr.startup(T3Srvr.java:482)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:440)
at weblogic.Server.main(Server.java:67)
>
<24/Nov/2009 10H14m GMT> <Notice> <WebLogicServer> <BEA-000365> <Server state ch
anged to FAILED>
<24/Nov/2009 10H14m GMT> <Error> <WebLogicServer> <BEA-000383> <A critical servi
ce failed. The server will shut itself down>
<24/Nov/2009 10H14m GMT> <Notice> <WebLogicServer> <BEA-000365> <Server state ch
anged to FORCE_SHUTTING_DOWN>
Thanks
A.

Answer 1

Hi there,
your concern is not without reason. But there is a way to configure NWDI to use both JDKs as required.
In the CBS-Settings
BUILD_TOOL_JDK_HOME - has to point to the JDK with the highest version. This should be the JDK 6 of your CE 7.2 I guess.
JDK_HOME_PATHS - contains aliases for the JDKs and the PATH to them. This aliases will be used in the build variant.
For example: JDK1.4_HOME=/usr/lib64/jvm/java;JDK1.5.0_HOME=/nwdi/sap_build_vm/sapjvm_5;default=/nwdi/sap_build_vm/sapjvm_5
This example tells CBS that there are 2 JDKs 1.4 and 1.5 and that the 1.5 JDK will be used by default.
When you create a track you have to set a build variant to use , in my case JDK 1.4, instead od the JDK1.5 by default.
The build variant will be:
     com.sap.jdk.home_path_key = JDK1.4_HOME
This tells CBS to use the JDK1.4 as defined in JDK_HOME_PATHS for building in this track. other tracks will use the default JDK as long as the build variant is not adjusted.
So its not problem to build with different JDKs in NWD if required.
Have a good time
Jan