BEST PICTURE

7 STEPS as below to do upgrade weblogic 1036 from JDK7 to JDK8

Install JDK 8;

Stop all processes that use the your MW_HOME.

Edit $MW_HOME/wlserver_10.3/common/bin/commEnv.sh and change the JAVA_HOME location.

For every domain, change the domain "setDomainEnv.sh" script to accomodate for the net JAVA_HOME .

Change the JDK location specified in nodemanager.properties for the default and any other existing nodemanager process

Replace the new JDK location on all the minor tools used in the same MW_HOME, such as BSU, uninstaller, etc.

Restart the processes as normal, they should take the new JDK version.

Please refer to following url for more details.

[http://akhilesh-humbe.blogspot.hk/2012/10/upgrade-jdk-used-by-oracle-weblogic.html]
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STEPS
C:OracleMiddlewareuser_projectsdomainsClassicDomain in
Edit files

setDomainEnv.cmd
set SUN_JAVA_HOME=C:Program FilesJavajdk1.8.0_101
set JAVA_HOME=C:Program FilesJavajdk1.8.0_101

setDomainEnv.sh
SUN_JAVA_HOME="C:/Program Files/Java/jdk1.8.0_101"
JAVA_HOME="C:/Program Files/Java/jdk1.8.0_101"

commEnv.sh
C:OracleMiddlewarewlserver_10.3common in
#  JAVA_HOME="C:/Program Files/Java/jdk1.7.0_79"
  JAVA_HOME="C:/Program Files/Java/jdk1.8.0_101"

nodemanager.properties
C:OracleMiddlewarewlserver_10.3common odemanager
#JavaHome=C:PROGRA~1JavaJDK17~1.0_7jre
JavaHome=C:PROGRA~1Javajdk1.8.0_101jre
This should solve the problem