I've have the following sub in my program 
sub sftp_file {

    my ($file,$destfile,$host,$port,$user,$privpath,$pubpath,$pass) = 
+@_;

    my $ssh2 = Net::SSH2->new();
    $ssh2->connect( $host,$port ) or $logger->info("Connect failed: $!
+\n");

    if ( !$ssh2->error ) {
        $ssh2->auth( username => $user, publickey => $pubpath, private
+key => $privpath, password => $pass, passphrase => undef ) or $logger
+->info("Authent
ication failed: $!\n");
    }

    if ( $ssh2->auth_ok ) {

        my $sftp = Net::SFTP::Foreign->new( ssh2 => $ssh2, backend => 
+'Net_SSH2' );
        $sftp->error and $logger->info("Unable to establish SFTP conne
+ction: $sftp->error\n");
        $sftp->put( "$file", "$destfile", best_effort => 1 ) or ( $log
+ger->info("Put failed: $sftp->error\n") && return );
        return 1;
    } else {
        return 0;
    }
}

[download]
The sub works fine if I call it before I startup and threads. If I call it in a thread I get the following error: 
Connect failed: Resource temporarily unavailable

[download]
When I turn on tracing of libssh2 and debug I see the following 
[libssh2] 0.822042 Transport: session_startup for socket 5
[libssh2] 0.822225 Transport: Sending Banner: SSH-2.0-libssh2_1.8.0
[libssh2] 0.822280 Socket: Sent 23/23 bytes at fe7b1570+0
[libssh2] 0.822334 Socket: Recved 0 bytes banner
[libssh2] 0.822366 Failure Event: -13 - Failed getting banner
Net::SSH2::DESTROY object 0x3413458
[libssh2] 0.825767 Transport: Freeing session resource
[libssh2] 0.825807 Transport: Extra packets left 0
[libssh2] 0.825839 Transport: unable to reset socket's blocking state

[download]
Is there work around ?

In reply to Net::SSH2 issue in thread by roperl

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