Iterator<Map.Entry<ExecutionStage, ManagementStage>> iterator = stageMap.entrySet().iterator();
while (iterator.hasNext()) {
final Map.Entry<ExecutionStage, ManagementStage> entry = iterator.next();
final ExecutionStage executionStage = entry.getKey();
final ManagementStage parent = entry.getValue();
for (int i = 0; i < executionStage.getNumberOfStageMembers(); i++) {
final ExecutionGroupVertex groupVertex = executionStage.getStageMember(i);
final ManagementGroupVertex managementGroupVertex = new ManagementGroupVertex(parent, groupVertex