<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div>hi,all</div><div>look at the output of  netstat, it is after at least 30minutes i un-plug cable.</div><div>how to make server know client's disconnect and disconnect channels(clean channels).</div><div><br></div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60029         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60033         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60028         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0  24815 192.168.5.240:5903          192.168.5.163:60030         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60019         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60027         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60032         ESTABLISHED 31315/qemu-kvm      </div><div>tcp        0      0 192.168.5.240:5903          192.168.5.163:60031         ESTABLISHED 31315/qemu-kvm      </div></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span>