diff --git a/xCAT-server/sbin/xcatd b/xCAT-server/sbin/xcatd
index 57722351c..d64fae069 100755
--- a/xCAT-server/sbin/xcatd
+++ b/xCAT-server/sbin/xcatd
@@ -298,6 +298,7 @@ if ($inet6support) {
   my $client;
   my $peerhost;
   my %packets;
+  my $actualpid=$$;
   until ($quit) {
     eval { 
 	while (1) {	
@@ -348,6 +349,9 @@ if ($inet6support) {
     if ($@) {
       syslog("local4|err","xcatd: possible BUG encountered by xCAT UDP service: ".$@);
     }
+    unless ($actualpid == $$) { #We should absolutely never be here, exponential growth from a plugin crash.
+        exit 1;
+    }
   }
 }