Input stream mark and reset do not preserve endianness

[thomas-breining]

When an input stream is marked, the underlying byteBuffer is duplicated using the java.nio.ByteBuffer.duplicate() function which does not replicate the buffer byte order.

orb/orbmain/src/main/java/com/sun/corba/ee/impl/encoding/CDRInputStream_1_0.java

Line 1922 in 8626fd5

byteBuffer_ = byteBuffer.duplicate();

This breaks the processing of little endian user exception replies which peeks at the exception id and resets the input stream with the wrong byte order.

orb/orbmain/src/main/java/com/sun/corba/ee/impl/protocol/ClientRequestDispatcherImpl.java

Line 549 in 8626fd5

String exceptionRepoId = peekUserExceptionId(inputObject);

[thomas-breining]

Hi,
I wrote a small unit test that shows the issue with a potential fix here https://github.com/thomas-breining/orb/commit/ef98f2a4f31d0273f7d5b4ff48f9e4b29352bf04.
Please don't hesitate to let me know if and how I can help further.
Thanks.