Send file client issue

[atavism]

There's occasions where connectivity succeeds between peers, 5-tuples are returned on both sides, but the send file transfer test fails. ICE debugging confirms the connection is established, and I can use netcat to validate messages can be exchanged, but the file transfer still terminates prematurely, and the error involves the delegation to some random port.

Full output:

Inside Coffee Bean, peer 1 as answerer
NATTY RESPONSE {"local":"192.168.180.17:51889","proto":"udp","remote":"107.170.244.214:51539","type":"5-tuple"}

peer 2 (offerer)
NATTY RESPONSE {"local":"107.170.244.214:51539","proto":"udp","remote":"24.43.23.102:59965","type":"5-tuple"}
0      2014-05-07 20:04:28,790 DEBUG [Thread-3] natty.Natty.run (Natty.java:249) - Sending file!!
6      2014-05-07 20:04:28,796 DEBUG [Thread-3] natty.SendFileClient.run (SendFileClient.java:39) - Starting send file client... from natty://107.170.244.214:51539 to natty://24.43.23.102:59965
209    2014-05-07 20:04:28,999 DEBUG [Thread-3] natty.SendFileClient.run (SendFileClient.java:59) - Binding to port 51539
340    2014-05-07 20:04:29,130 DEBUG [connect-0] natty.SendFileClientHandler.<init> (SendFileClientHandler.java:34) - Sending file!!
381    2014-05-07 20:04:29,171 DEBUG [connect-0] natty.SendFileClientHandler.<init> (SendFileClientHandler.java:47) - SENT FILE!!
385    2014-05-07 20:04:29,175 DEBUG [connect-0] natty.SendFileClientHandler.<init> (SendFileClientHandler.java:34) - Sending file!!
391    2014-05-07 20:04:29,181 DEBUG [connect-0] natty.SendFileClientHandler.<init> (SendFileClientHandler.java:47) - SENT FILE!!
3412   2014-05-07 20:04:32,202 WARN  [connect-0] nio.SelectionKeyUDT.logError (SelectionKeyUDT.java:436) - logic error : 
    [id: 0x2aa72ca3] poll=ERROR_WRITE ready=---- inter=-C-- STREAM CONNECTOR CONNECTING bind=/0.0.0.0:36774 peer=null:0