try to build on several jdk
diff --git a/vars/asfStandardUtilitiesBuild.groovy b/vars/asfStandardUtilitiesBuild.groovy
index 07f3083..3251aea 100644
--- a/vars/asfStandardUtilitiesBuild.groovy
+++ b/vars/asfStandardUtilitiesBuild.groovy
@@ -60,13 +60,14 @@
                 agent { node { label 'ubuntu' } }
                 options { timeout(time: 120, unit: 'MINUTES') }               
                 steps{
-		    def jdklist = ['jdk_11_latest','jdk_12_latest','jdk_13_latest','jdk_14_latest','jdk_15_latest']
-		    for (ajdk in jdklist) {
-			stage("build on $ajdk") {    
-				mavenBuild( ajdk, cmdline, mvnName, publishers,false)
-			}
+	            script {	
+		        def jdklist = ['jdk_11_latest','jdk_12_latest','jdk_13_latest','jdk_14_latest','jdk_15_latest']
+		        for (ajdk in jdklist) {
+			    stage("build on $ajdk") {    
+			    	mavenBuild( ajdk, cmdline, mvnName, publishers,false)
+			    }
+		        }
 		    }
-                    
                 }
             }
         }