private void processOverWrite(DFSClient dfsClient, WRITE3Request request,
Channel channel, int xid, IdUserGroup iug) {
WccData wccData = new WccData(latestAttr.getWccAttr(), null);
long offset = request.getOffset();
int count = request.getCount();
WriteStableHow stableHow = request.getStableHow();
WRITE3Response response;
long cachedOffset = nextOffset.get();
if (offset + count > cachedOffset) {
LOG.warn("Treat this jumbo write as a real random write, no support.");
response = new WRITE3Response(Nfs3Status.NFS3ERR_INVAL, wccData, 0,