From build 144 onwards most of the rmi related test cases are failing if we run all jdk test cases as a single group(jdk_stable group).
All of the test cases are failing with any of the following two error log:
“test result: Failed. Execution failed: `main' threw exception: java.lang.NoClassDefFoundError: TestFailedException” or
“result: Failed. Execution failed: `main' threw exception: java.lang.NullPointerException”

Attached two log files for reference.

Created small sub group of test cases which produce error consistently. It has to run no concurrency or conc:1 or 2.
jdk_rmi_test = \
    com/sun/jndi/ldap/LdapTimeoutTest.java \
   com/sun/jndi/rmi/registry/RegistryContext/ContextWithNullProperties.java \
    com/sun/jndi/rmi/registry/RegistryContext/UnbindIdempotent.java \
    java/rmi/Naming/LookupNameWithColon.java