LWP::UserAgent returns incomplete 2GB response message - perl

Question

I am using LWP::UserAgentto send request on a URL. But sometime in the response I am getting incomplete XML response.
Code
$args->{pua} = LWP::UserAgent->new();
$args->{header} = HTTP::Headers->new;
$args->{header}->header("Content-Type" => "text/xml", "SOAPAction" => $args->{soapaction});
$request = HTTP::Request->new( "POST", $args->{endpoint}, $args->{header}, $args->{xml});
$response = $args->{pua}->simple_request($request);
my $xmlResponse = $response->content;
In the $xmlResponse sometime I am getting incomplete response. Why is it happening?
ResponseHeader
Connection: close
Date: Tue, 19 May 2015 11:07:37 GMT
Server: nginx/1.6.2
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Type: text/xml;charset=ISO-8859-1
Client-Date: Tue, 19 May 2015 11:07:40 GMT
Client-Peer: 202.77.98.11:80
Client-Response-Num: 1
Client-Transfer-Encoding: chunked
X-Frame-Options: SAMEORIGIN

Answer 1

LWP may return incomplete response when it failed to read whole body because of the timeout or other read error. In this case $response->is_success will be true and $response->code will be 200, but response headers will contain special header called X-Died.
So you can check this header:
unless ($response->is_success) {
die "Response failed: ", $response->status_line;
}
if ($response->header('X-Died')) {
die "Response failed (internal): ", $response->header('X-Died');
}