diff --git a/xCAT-server/sbin/xcatd b/xCAT-server/sbin/xcatd
index a507fec45..fd31cd353 100755
--- a/xCAT-server/sbin/xcatd
+++ b/xCAT-server/sbin/xcatd
@@ -517,6 +517,8 @@ sub grant_tcrequests {
 }
 
 sub do_discovery_process {
+	$SIG{TERM} = 'DEFAULT';
+	$SIG{INT} = 'DEFAULT';
 	my %args =@_;
 	my $broker = $args{broker};
 	my $quit=0;