diff --git a/xCAT-server-2.0/lib/xcat/plugins/blade.pm b/xCAT-server-2.0/lib/xcat/plugins/blade.pm
index 7af1093dd..0b85db008 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/blade.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/blade.pm
@@ -1158,6 +1158,7 @@ sub dompa {
      }
      print $out freeze([\%err]);
      print $out "\nENDOFFREEZE6sK4ci\n";
+     yield;
      return 1,"General error establishing SNMP communication";
   }
   my $tmp = $session->get([$mmprimoid.".1"]);
@@ -1197,6 +1198,7 @@ sub dompa {
       print $out freeze([\%output]);
       print $out "\nENDOFFREEZE6sK4ci\n";
     }
+    yield;
   }
   #my $msgtoparent=freeze(\@outhashes); # = XMLout(\%output,RootName => 'xcatresponse');
   #print $out $msgtoparent; #$node.": $_\n";
diff --git a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
index e9741b382..a7e11a14a 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
@@ -4581,6 +4581,7 @@ sub donode {
     print $outfd freeze([\%output]);
     print $outfd "\nENDOFFREEZE6sK4ci\n";
   }	
+  yield;
   #my $msgtoparent=freeze(\@outhashes);
  # print $outfd $msgtoparent;
 }
diff --git a/xCAT-server-2.0/sbin/xcatd b/xCAT-server-2.0/sbin/xcatd
index b84e263c1..0d16fa15c 100755
--- a/xCAT-server-2.0/sbin/xcatd
+++ b/xCAT-server-2.0/sbin/xcatd
@@ -258,7 +258,7 @@ if ($inet6support) {
   until ($quit) {
     eval { 
 	while (1) {	
-        until ($select->can_read(5)) {if ($quit) { last; }} #Wait for data
+        until ($select->can_read(5)) { if ($quit) { last; }; yield; } #Wait for data
 	while ($select->can_read(0)) { #Pull all buffer data that can be pulled
 	   $part = $socket->recv($data,1500);
            ($sport,$client) = sockaddr_in($part);
@@ -629,6 +629,7 @@ sub dispatch_callback {
    } else {
       print $dispatch_parentfd freeze($rsp);
       print $dispatch_parentfd "\nENDOFFREEZE6sK6xa\n";
+      yield; #This has to happen before next line could possibly work anyway
       <$dispatch_parentfd>; #Block until parent acks data
    }
 }