Stalls when connection is interrupted during DNS lookup

[cyberduck]

f3579a0 created the issue

When there is no response from the server Cyberduck keeps trying for a very long time. This would be fine, but it also ignores cancel requests (essentially requiring a force quit unless the user has Zen-like patience).
Related to ticket 943?

[cyberduck]

@dkocher commented

Is this really on version 2.7?

[cyberduck]

f3579a0 commented

Yes. Upgraded from 2.6.x (whatever was the latest) using the built-in updater. "About Cyberduck" reads 2.7 (2594).

I tried downloading the full .dmg package but I get the same result. Clicking the red Stop button switches the status at the bottom of the windows to "Disconnected", but the progress thingy at the bottom left corner keeps spinning until it times out.
Double-clicking another bookmark while it's doing this opens the dialog that says "Disconnect from 10.55.55.14" (in my case). Clicking "Disconnect" causes the same dialog to open again (and again, and again).

[cyberduck]

f3579a0 commented

Also, this is on a MacBook Pro, so I'm using the Intel code.

[cyberduck]

f3579a0 commented

Curiously, this only happens when attempting to connect using the FTP protocol. When using SFTP cancelling is possible, but only if I press the stop button twice(!).

[cyberduck]

f3579a0 commented

I still have this problem in 2.7.2 (2649).

[cyberduck]

@dkocher commented

When a connection attempt is interrupted during the DNS lookup, no other connection can be opened until the lookup returns (which might take long on misconfigured networks)

[cyberduck]

@dkocher commented

See 8dedbc9.