diff --git a/jjb/pipeline/voltha-scale-multi-stack.groovy b/jjb/pipeline/voltha-scale-multi-stack.groovy
index 5a56f29..6574492 100644
--- a/jjb/pipeline/voltha-scale-multi-stack.groovy
+++ b/jjb/pipeline/voltha-scale-multi-stack.groovy
@@ -101,6 +101,9 @@
 
             cd $WORKSPACE
             rm -rf $WORKSPACE/*
+
+            # remove orphaned port-forward from different namespaces
+            ps aux | grep port-forw | grep -v grep | awk '{print \$2}' | xargs --no-run-if-empty kill -9
           """
         }
       }
diff --git a/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy b/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
index 5414449..15143e7 100644
--- a/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
+++ b/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
@@ -45,6 +45,10 @@
     stage ('Cleanup') {
       steps {
         timeout(time: 11, unit: 'MINUTES') {
+          sh """
+          # remove orphaned port-forward from different namespaces
+            ps aux | grep port-forw | grep -v grep | awk '{print \$2}' | xargs --no-run-if-empty kill -9
+          """
           script {
             def namespaces = ["infra"]
             // FIXME we may have leftovers from more VOLTHA stacks (eg: run1 had 10 stacks, run2 had 2 stacks)