Most likely it has been closed by the peer already. (From a pure logic point of view, it is also possible that your file descriptor is a bad one anyway, due to other programming errors)
Following piece of code demos this situation:
use strict;
use IO::Socket;
use threads;
$| = 1;
threads->create(\&server);
my $socket = IO::Socket::INET->new(Proto => "tcp", PeerAddr => "localh
+ost", PeerPort => 7001) || print "Socket creation error: $!\n";
sleep(5);
print "about to close socket on client side\n";
close($socket);
print "closed socket on client side\n";
print $!;
sub server {
my $server = new IO::Socket::INET(Proto => "tcp", LocalPort => 700
+1, Listen => 5)
|| die "failed to establish socket\n";
my $client = $server->accept;
sleep(1);
print "about to close socket on server side\n";
close($client);
print "closed socket on server side\n";
}
|