FTPServer 1.0.4: suspect race condition during requestPassivePort() hanging FTP(S) server with one passive data connection port

[Fred Moore]

Niklas, All,

we found an issue related to requestPassivePort() which may lead to an
unresponsive V1.0.4 FTP (or FTP/S) Server, this issue can be reproduced.

http://issues.apache.org/jira/browse/FTPSERVER-359 contains full description
of the symptoms and a minimalist java client and server to reproduce it.

Can anyone shed any light on this?

Any help is really appreciated.
Cheers,
F.