Net::OpenSSH::Gateway->find_gateway fails when ControlPersist option is set - perl

Question

I am trying to create a persistent gateway connection using Net::OpenSSH::Gateway. Below is the code snippet I am using for the same.
my %proxy_opts = (
host => $host,
port=>$port,
password=>$password,
user=>$user ,
scheme=>"ssh",
ssh_cmd => '/usr/bin/ssh',
master_opts =>
[ -o=>"StrictHostKeyChecking=no",
-o=>"TCPKeepAlive=no",
-o=>"ServerAliveInterval=30",
-o=>"ServerAliveCountMax=90",
-o=>"ControlPath=/tmp/ssh-master-%h_%p_%r",
-o=>"ControlPersist=yes"
]
);
my %gateway_settings = ( proxies=>[ {%proxy_opts} ]);
my $gateway = Net::OpenSSH::Gateway->find_gateway(%gateway_settings, errors=>$errors);
I get the error below. But if I remove the option ControlPath and ControlPersist the entire thing works fine.
[ERROR ] unable to establish master SSH connection: bad ssh master at
/root/.libnet-openssh-perl/spangeni-j1.zscaler.-31930-744378, socket
owned by pid 31933 (pid 31931 expected)

Answer 1

I think it's a bug in the module. The module Net::OpenSSH::Gateway doesn't exist on CPAN, and the author already said that:
I have not published it on CPAN yet because, even it is already
functional, I have found some problems with its internal architecture
that I want to solve first. -Source
And also if you see the documentation of Net::OpenSSH you'll see that gateway is an experimental feature.
BTW what version of OpenSSH are you using? ControlPersist requires OpenSSH 5.6 or newer.

Answer 2

If you have tunnels enabled on the gateway machine, you don't need to use Net::OpenSSH::Gateway at all.
my $ssh_g=Net::OpenSSH->new($gateway);
my $proxy_command=$ssh_g->make_remote_command({tunnel => 1}, $host, 22);
my $ssh=Net::OpenSSH->new($host,
master_opts => [-o => "ProxyCommand=$proxy_command"]);