+=head1 CheckModPerlHandler
+
+Make sure we're not running with SetHandler perl-script.
+
+=cut
+
+sub CheckModPerlHandler{
+ my $self = shift;
+ my $env = shift;
+
+ # Plack::Handler::Apache2 masks MOD_PERL, so use MOD_PERL_API_VERSION
+ return unless( $env->{'MOD_PERL_API_VERSION'}
+ and $env->{'MOD_PERL_API_VERSION'} == 2);
+
+ my $handler = $env->{'psgi.input'}->handler;
+
+ return unless defined $handler && $handler eq 'perl-script';
+
+ $RT::Logger->critical(<<MODPERL);
+RT has problems when SetHandler is set to perl-script.
+Change SetHandler in your in httpd.conf to:
+
+ SetHandler modperl
+
+For a complete example mod_perl configuration, see:
+
+https://bestpractical.com/rt/docs/@{[$RT::VERSION =~ /^(\d\.\d)/]}/web_deployment.html#mod_perl-2.xx
+MODPERL
+
+ my $res = Plack::Response->new(500);
+ $res->content_type("text/plain");
+ $res->body("Server misconfiguration; see error log for details");
+ return $res;
+}