.size()

vars/qgAnsiblePipeline.groovy

@@ -32,7 +32,7 @@ def call(body) {
 
         stage('Deploy') {
             arr_machines = machines.split(",")
-            count = arr_machines.count / 2
+            count = arr_machines.size() / 2
             echo count
             machines_list = _utils.partition(arr_machines, count)
             echo machines_list