Current tier or client isn't available

[tonyiweb]

17:39:23.521 [bt-client(..333665)] INFO c.turn.ttorrent.client.SharedTorrent - ... 80% complete
17:39:23.602 [bt-client(..333665)] INFO c.turn.ttorrent.client.SharedTorrent - ... 90% complete
17:39:23.763 [bt-client(..333665)] DEBUG c.turn.ttorrent.client.SharedTorrent - temp: we have 0/162598399 bytes (0.0%) [0/311 pieces].
17:39:23.764 [bt-announce(..333665)] INFO c.t.t.client.announce.Announce - Starting announce loop...
17:39:23.765 [bt-announce(..333665)] WARN c.t.t.client.announce.Announce - Current tier or client isn't available
17:39:23.767 [bt-client(..333665)] INFO com.turn.ttorrent.client.Client - SHARING 0/311 pieces (0.00%) [0/0] with 0/0 peers at 0.00/0.00 kB/s.
17:39:26.768 [bt-client(..333665)] INFO com.turn.ttorrent.client.Client - SHARING 0/311 pieces (0.00%) [0/0] with 0/0 peers at 0.00/0.00 kB/s.
17:39:28.768 [bt-announce(..333665)] WARN c.t.t.client.announce.Announce - Current tier or client isn't available
17:39:29.770 [bt-client(..333665)] INFO com.turn.ttorrent.client.Client - SHARING 0/311 pieces (0.00%) [0/0] with 0/0 peers at 0.00/0.00 kB/s.
17:39:32.772 [bt-client(..333665)] INFO com.turn.ttorrent.client.Client - SHARING 0/311 pieces (0.00%) [0/0] with 0/0 peers at 0.00/0.00 kB/s.

I can download files(with suffix .part) successfully, but can not finish this process, so it did not finish indeed.

[tonyiweb]

@ptgoetz could you help me? Or could you provide me a sample to use this?