If we raise a rpc exception in the server we don't correctly handle clients afterwards. If we set a dcerpc fault and send the packet to the client we need to return NT_STATUS_PIPE_DISCONNECTED on the trans2 level till the client closes the connection.
http://thread.gmane.org/gmane.network.protocol.cifs.general/291
Metadata Update from @asn: - Issue assigned to asn - Issue set to the milestone: Future Releases