I was sharing an LWP::UserAgent object between threads, based on advice from some monks that it was OK to do so. I changed that, and just tested again, and same problem. Here's the code for the main loop:
my $pm = new Parallel::ForkManager(20);

for my $i (0..$#itemstoget) {
        $pm->start and next; # do the fork
        my ($id,$url,$title,$excerpt)  = @{ $itemstoget[$i] };
        my $user_agent = LWP::UserAgent->new;
        $user_agent->timeout(30);
        my $request = HTTP::Request->new('GET', $url);
        my $response = $user_agent->request($request);
        my $dbh = connectdb('blogdb');
        if ($response->is_success) {
                unless (isforeignlanguage($response,$title,$excerpt,$u
+rl)) {
                    my $html = resolve_charset($response->content);
                    # if the html meets the criteria for at least one 
+client that claims it, extract the text
                    my $itemok = checkhtml($dbh,$id,$html);
                    if ($itemok) {
                        inserthtml($dbh,$id,$html);
                        print "OK  $id ",substr($url,0,50),"\n";
                    }
                    else {
                        print "SKIP     $url\n";
                        dosql($dbh,"update blogitems set getattempts=9
+99 where id=$id");
                    }
                }
                else {
                    print "FOREIGN  $url\n";
                    dosql($dbh,"update blogitems set getattempts=999 w
+here id=$id");
                }
        }
        else {
            print "FAILED  $url\n";
            dosql($dbh,"update blogitems set getattempts=getattempts +
+ 1 where id=$id");
        }
        $dbh->disconnect;
        undef $user_agent;
        $pm->finish;
}

$pm->wait_all_children;

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As for the subs, resolve_charset figures out and decodes the charset, isforeignlanguage applies Lingua::Identify to see if it's English ir not, itemok makes sure the post contains requisite keywords, and inserthtml puts it into the database.

As for threads vs. pseudofork, it's bc I'm still learning this multi-threaded stuff and pseudofork seems more straightforward. Would using threads instead solve this problem?

In reply to Re^2: LWP, DBI and Free to Wrong Pool error by cormanaz
in thread LWP, DBI and Free to Wrong Pool error by cormanaz

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