th.send(this.req, this.rsp);
                    long cnt = this.rsp.getCount();
                    this.fp += cnt;
                    len -= cnt;
                    off += cnt;
                    if ( log.isTraceEnabled() ) {
                        log.trace(String.format("Wrote at %d remain %d off %d len %d", this.fp, len - w, off, w));
                    }
                }