try to add resonable warning if client connections vanished

The proxy call is done async, so the original connection can be
closed already. This just adds a reasonable warning message. We
can remove the message later if that turns out to work as expected.

diff --git a/PVE/HTTPServer.pm b/PVE/HTTPServer.pm
index 1f0ed5c912e903ebfb7da2bd023aefb5e7f48a4c..545d64b6f039bb8c1a02283aa4b3671985510454 100755 (executable)
--- a/PVE/HTTPServer.pm
+++ b/PVE/HTTPServer.pm
@@ -334,6 +334,11 @@ sub proxy_request {
 
                undef $w;
 
+               if (!$reqstate->{hdl}) {
+                   warn "proxy detected vanished client connection\n";
+                   return;
+               }
+
                eval {
                    my $code = delete $hdr->{Status};
                    my $msg = delete $hdr->{Reason};