final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.sync);
SyncRequest request = new SyncRequest();
SyncResponse response = new SyncResponse();
request.setPath(serverPath);
cnxn.queuePacket(h, new ReplyHeader(), request, response, cb,
clientPath, serverPath, ctx, null);
}