jdk 1.7.25 CORBA idl build warning: Anonymous sequences and array are deprecated

jdk 1.7.25 CORBA idl build warning: Anonymous sequences and array are
deprecated

My java project updated to jdk 1.7.25, over Solaris 10 environment, this
is the first time seen that there is a new warning message in build log:
Anonymous sequences and array are deprecated (build IDL)
problem: The main GUI(build by jdk 1.7.25) cannot been brought up
We think this maybe a problem(but not sure). The idl file is very simple:
$ cat UnsubscribeAttb.idl
//../../../proj/request/requestIfc/UnsubscribeAttb.idl
include ../../../proj/request/requestIfc/subscribeKey.idl
struct requestIfc {
bool aKey;
sequence<subscribeKey> UnsubscribeAttbList;
}
I put in "typedef" at the front of the last line, but build immediately
gives an error complained this line, but didnot give me a specific reason.
Looking for your help.
Thanks, Curtis