I am trying to use Net::SSH:Expect in a script that has threading on a linux host (2.6.34.9-69.fc13.x86_64 #1 SMP Tue May 3 09:23:03 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux). When my script starts, it opens a thread and a queue for logging.

Then I try to open a SSH session (using RSA). It always fails on read_all with SSH_CONNECTION_ABORTED.

When I omit the logging thread, the ssh connection works. Is there a known conflict between Net::SSH::Expect and threads?

First I set up the queue and the LogMonitor thread: 
sub _startMonitorThread {
    $self = shift;
    $self->{LogQ} = Thread::Queue->new;
    my $id       = "LogMonitor";
    my $thrd = new threads \&_LogMonitor, $id;
    if ( !$thrd ) {
        $self->{errormsg} = "$thisFunc:Cannot start $id thread";
        $self->TestLogError();
        return -1;
    }
    $self->{thrds}->{logmon} = $thrd;
    $self->{logqueue} = 1;
    return 0;
}

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Then I create an ssh connection: 
sub getsshrsa {
    my $thisFunc  = ( caller(0) )[3];
    my $opts = shift;
    my $ip = $opts->{ip};
    $opts->{timeout} = 5 if (!$opts->{timeout});

    my $ssh = Net::SSH::Expect->new (
        host => $ip,
        user => $opts->{user},
        password => $opts->{password},
        ssh_option => "-T",
        raw_pty => 1
    );
    my $error = undef;
    $ssh->run_ssh() or $error = "SSH process couldn't start: $!";
    return $error if ($error);
    $ssh->send(" ");
    sleep 2;
    my $output = $ssh->read_all(5);  # <-- fails here
    return $ssh;
}

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The result is this: 
Killed by signal 1.
SSHConnectionAborted at MGComm.pm line 87
 at /opt/ActivePerl-5.14/site/lib/Net/SSH/Expect.pm line 585
        Net::SSH::Expect::_sec_expect('Net::SSH::Expect=HASH(0x34f9890
+)', 5, '-re', 'Regexp=REGEXP(0x351a2c0)') called at /opt/ActivePerl-5
+.14/site/lib/Net/SSH/Expect.pm line 419
        Net::SSH::Expect::read_all('Net::SSH::Expect=HASH(0x34f9890)',
+ 5) called at MGComm.pm line 87
        MGComm::getsshrsa('HASH(0x35235e0)') called at MGcld.pm line 8
+7

[download]

In reply to Net::SSH:Expect and threads incompatible? by cebundy

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