RpcInfo info = (RpcInfo) e.getMessage();
RpcCall rpcCall = (RpcCall) info.header();
final int portmapProc = rpcCall.getProcedure();
int xid = rpcCall.getXid();
XDR in = new XDR(info.data().toByteBuffer().asReadOnlyBuffer(),
XDR.State.READING);
XDR out = new XDR();
if (portmapProc == PMAPPROC_NULL) {
out = nullOp(xid, in, out);