I am setting up a Mason environment with Apache(2.0.53) and mod_perl2, and am trying to use the Net::SSH::Perl(1.27) module behind the scenes to get some info from another linux machine. I can login and execute the command, but before it finishes the $session->cmd process hangs. I setup a shell example(below) with the same syntax (and all modules except Mason env and it works fine). I setup a CGI::Application env, which uses the same module and it works fine.....

Even if I send a bogus command in the Mason env example, the shell gives an error back and cmd exits, but for any legit command I don't get back any output and it hangs(sits there till I kill the server). I have tried something as simple as ls, or in this case ps. 

 
my $sshSession = Net::SSH::Perl->new($address, debug => 'true', protoc
+ol => '2,1');
# Login works fine            
$sshSession->login('xxxxxx','xxxxx') || die "Ssh login       Didn't wo
+rk";

my $command = "ps aux";

# Execute a command                       
my  ($out, $err, $exit) = $sshSession->cmd($command);
# hangs while executing ...

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The debug from each side (ssh-perl and sshd) can be seen here:


Here is the end debug portion from Net::SSH::Perl.. 
howboutdat: Login completed, opening dummy shell channel.
howboutdat: channel 0: new [client-session]
howboutdat: Requesting channel_open for channel 0.
howboutdat: channel 0: open confirm rwindow 0 rmax 32768
howboutdat: Got channel open confirmation, requesting shell.
howboutdat: Requesting service shell on channel 0.
howboutdat: channel 1: new [client-session]
howboutdat: Requesting channel_open for channel 1.
howboutdat: Entering interactive session.
howboutdat: Sending command: ps aux
howboutdat: Requesting service exec on channel 1.
howboutdat: channel 1: open confirm rwindow 0 rmax 32768
howboutdat: input_channel_request: rtype exit-status reply 0
howboutdat: channel 1: rcvd eof
howboutdat: channel 1: output open -> drain
howboutdat: channel 1: rcvd close
howboutdat: channel 1: input open -> closed
howboutdat: channel 1: close_read
# Hangs right here

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Here is the end debug from the sshd side:
debug1: input_session_request
debug1: channel 1: new [server-session]
debug1: session_new: session 1
debug1: session_open: channel 1
debug1: session_open: session 1: link with channel 1
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 1 request exec reply 0
debug1: session_by_channel: session 1 channel 1
debug1: session_input_channel_req: session 1 req exec
debug1: PAM establishing creds
debug1: fd 11 setting O_NONBLOCK
debug2: fd 11 is O_NONBLOCK
debug1: fd 14 setting O_NONBLOCK
debug2: channel 1: read 344 from efd 14
debug2: channel 1: rwin 32768 elen 344 euse 1
debug2: channel 1: sent ext data 344
debug1: Received SIGCHLD.
debug1: session_by_pid: pid 24263
debug1: session_exit_message: session 1 channel 1 pid 24263
debug1: channel request 1: exit-status
debug1: session_exit_message: release channel 1
debug1: channel 1: write failed
debug1: channel 1: close_write
debug1: channel 1: output open -> closed
debug1: session_close: session 1 pid 24263
debug1: channel 1: read<=0 rfd 11 len 0
debug1: channel 1: read failed
debug1: channel 1: close_read
debug1: channel 1: input open -> drain
debug2: channel 1: read 0 from efd 14
debug2: channel 1: closing read-efd 14
debug1: channel 1: ibuf empty
debug1: channel 1: send eof
debug1: channel 1: input drain -> closed
debug1: channel 1: send close
debug2: notify_done: reading
debug3: channel 1: will not send data after close
### Hangs right here ########

[download]
If have searched other nodes and googled quite a bit, but can't seem to find anyone else who has experienced this problem. I assume it is related to the import/export expections of HTML::Mason/Apache::Request and Net::SSH::Perl, but obviously have no idea.
Update:

I have been able to narrow the issue down, but not solve it entirely. I can use SSH1 (with use_pty => 1) and it works fine in the Mason environment. When I try to use SSH2, it gets all the way to the channel close read portion, but hangs in the call to $select_class->select(IO::Select module). It isn't the original call either but the last call to select in the client loop(SSH2.pm) before exit. For whatever reason the last call to $select_class->select($rb,$wb) gets all the way to the end of the select function but won't return the @result. For now I guess I'll use SSH1, but would like to figure out the solution so I can pass it on to anyone else who experiences this problem.

In reply to Net::SSH::Perl hangs(during cmd), but only in Mason environment by perldragon80

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