Re^2: threads and Net::OpenSSH

[rastoboy]

BrowserUK: lol neither am I :-)

I guess the main thing I don't understand is why my "tail -f" sessions die when I join those threads. My understanding of join() is that it tells the program to wait for the thread to finish. But a tail -f by itself would never finish, right?

[BrowserUk]

A quick look at the POD suggests that Net::OpenSSH implements timeouts that will close connections after a lack of network activity.

A grep inside turns up this calculation which suggests that the default timeout is 90 (or 30?) seconds:

my $timeout = int((($self->{_timeout} || 90) + 2)/3);

My guess is that if the remote system is idle, tail -f syslog will produce no output and so the module closes the connection. Maybe you should consider using an explicit timeout.

[rastoboy]

Hmm, actually I'm seeing in some cases that it merely detaches those tail -f threads. What would be the best way to actually terminate those tail -f threads when I'm ready? There seem to be a lot of options.

[BrowserUk]

I'm seeing in some cases that it merely detaches those tail -f threads.

Hm What "it"?

Threads do not detach unless explicitly detached. join() will block until the thread terminates.

Unless you've changed your code, what you're suggesting isn't possible.