ORA-30689: improper value for ORA_DEBUG_JDWP
Cause: An improper value was used for ORA_DEBUG_JDWP when trying to establish a connection to a debugger. The value either did not conform to the format of ORA_DEBUG_JDWP or was too long
Action: Correct the value for ORA_DEBUG_JDWP and try again
https://support.oracle.com/
http://www.oracle.com/