@Override
public void fsync(String src, long fileId, String client,
long lastBlockLength)
throws AccessControlException, FileNotFoundException,
UnresolvedLinkException, IOException {
FsyncRequestProto req = FsyncRequestProto.newBuilder().setSrc(src)
.setClient(client).setLastBlockLength(lastBlockLength)
.setFileId(fileId).build();
try {
rpcProxy.fsync(null, req);
} catch (ServiceException e) {