how to change class path of java in claudera manager.
Is this what you're referring to - the ability to manually specify what JAVA_HOME should be on all managed hosts of a Cloudera Manager cluster, instead of letting the auto-detection logic run?
Per http://www.cloudera.com/content/cloudera/en/documentation/core/latest/topics/cm_props_host.html, top of page:
Host Configuration Properties >Advanced
Java Home Directory Explicitly set the value of JAVA_HOME for all processes. This will override the auto-detection logic that is normally used.