Hi! I've been spending 2 days on trying to find a thread and SSH module that works together, but to no avail. You're my last hope.

I have a few hundred nodes running on GPRS links that I need to do some work on once in a while. Since GPRS are so damned slow, my ordinary approach of connecting one by one is not viable, thus I began looking on threading. However, when I run the example code posted below, I randomly run into this errormessage:

perl: ath.c:193: _gcry_ath_mutex_lock: Assertion `*lock == ((ath_mutex_t) 0)' failed.

4 of 5 times it exit early with that message, 1 in 5 it complete the job.

I've tried Net::SSH::Expect as well as Thread::Pool, Threads & Thread::Queue and any combination of those to no avail. Net::SSH::Expect behaved even worse.

#!/usr/bin/perl

use Thread::Pool;            
use Net::SSH2;                
use strict;

open (MYINPUTELEMENTS, "./list.txt");        

my $pool = Thread::Pool->new(        
{
  workers => 10,                    
  do => \&worker_parse,                
});

while (my $element = <MYINPUTELEMENTS>) {    
  if ($element =~ /(\d+)(\.\d+){3}/) {        
    $pool->job($element);                
  }
}
close (MYINPUTELEMENTS);    
$pool->shutdown;    

sub worker_parse {    
  my $inIP = $_[0];    
  chomp($inIP);    
  my $ssh2 = Net::SSH2->new();
  if ($ssh2->connect($inIP)) { 
    if ($ssh2->auth_password('user','pass')) {
    my $gssChannel = $ssh2->channel();
      $gssChannel->exec('ls -l / | wc -l');
      my $gssData;
      my $gssLen = $gssChannel->read($gssData,8192);
      chomp($gssData); print "gss: $gssData - ";
      $gssChannel->close;
      
      my $lcsChannel = $ssh2->channel();
      $lcsChannel->exec('ls -l /etc | wc -l');
      my $lcs2Data;
      my $lcs2Len = $lcsChannel->read($lcs2Data,8192);
      chomp($lcs2Data); print "lcs2: $lcs2Data\n";
      $lcsChannel->close;
      $ssh2->disconnect;
    } else {
      print "Authentication Failed\n";
    }
  } else {
     print "Connection Failed\n";
  }
}

[download]
I'm running this on perl 5.12.4 on Ubuntu 11.10. Please help me save the little hair I have left by pointing me in the direction of a possible solution. ;-)

In reply to Net::SSH2 not thread safe? by Anonymous Monk

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