Program: 115601
Project: 115601
Buggy source:
/** 
 * This will create the GroupMonitor based on given groupId by going thr Topology
 * @param parentMonitor parent of the monitor
 * @param context       groupId of the group
 * @param appId         appId of the relevant application
 * @return Group monitor
 * @throws DependencyBuilderException    throws while building dependency for app monitor
 * @throws TopologyInConsistentException throws while traversing thr topology
 */
public static Monitor getGroupMonitor(ParentComponentMonitor parentMonitor,ApplicationChildContext context,String appId,List<String> instanceIds) throws DependencyBuilderException, TopologyInConsistentException {
  GroupMonitor groupMonitor;
  Application application=ApplicationHolder.getApplications().getApplication(appId);
  if (application == null) {
    throw new RuntimeException("String_Node_Str" + appId);
  }
  try {
    ApplicationHolder.acquireReadLock();
    Group group=application.getGroupRecursively(context.getId());
    if (group == null) {
      throw new RuntimeException("String_Node_Str" + context.getId());
    }
    boolean hasScalingDependents=false;
    if (parentMonitor.getScalingDependencies() != null) {
      for (      ScalingDependentList scalingDependentList : parentMonitor.getScalingDependencies()) {
        if (scalingDependentList.getScalingDependentListComponents().contains(context.getId())) {
          hasScalingDependents=true;
        }
      }
    }
    groupMonitor=new GroupMonitor(group,appId,instanceIds,hasScalingDependents);
    groupMonitor.setAppId(appId);
    groupMonitor.setParent(parentMonitor);
    if (parentMonitor.hasStartupDependents() || (context.hasStartupDependents() && context.hasChild())) {
      groupMonitor.setHasStartupDependents(true);
    }
 else {
      groupMonitor.setHasStartupDependents(false);
    }
    groupMonitor.startScheduler();
  }
  finally {
    ApplicationHolder.releaseReadLock();
  }
  Group group=application.getGroupRecursively(context.getId());
  groupMonitor.createInstanceAndStartDependencyAtStartup(group,instanceIds);
  return groupMonitor;
}

Fixed version (ground truth):
/** 
 * This will create the GroupMonitor based on given groupId by going thr Topology
 * @param parentMonitor parent of the monitor
 * @param context       groupId of the group
 * @param appId         appId of the relevant application
 * @return Group monitor
 * @throws DependencyBuilderException    throws while building dependency for app monitor
 * @throws TopologyInConsistentException throws while traversing thr topology
 */
public static Monitor getGroupMonitor(ParentComponentMonitor parentMonitor,ApplicationChildContext context,String appId,List<String> instanceIds) throws DependencyBuilderException, TopologyInConsistentException {
  GroupMonitor groupMonitor;
  Application application=ApplicationHolder.getApplications().getApplication(appId);
  if (application == null) {
    throw new RuntimeException("String_Node_Str" + appId);
  }
  try {
    ApplicationHolder.acquireReadLock();
    Group group=application.getGroupRecursively(context.getId());
    if (group == null) {
      throw new RuntimeException("String_Node_Str" + context.getId());
    }
    boolean hasScalingDependents=false;
    if (parentMonitor.getScalingDependencies() != null) {
      for (      ScalingDependentList scalingDependentList : parentMonitor.getScalingDependencies()) {
        if (scalingDependentList.getScalingDependentListComponents().contains(context.getId())) {
          hasScalingDependents=true;
        }
      }
    }
    groupMonitor=new GroupMonitor(group,appId,instanceIds,hasScalingDependents);
    groupMonitor.setAppId(appId);
    groupMonitor.setParent(parentMonitor);
    if (parentMonitor.hasStartupDependents() || (context.hasStartupDependents() && context.hasChild())) {
      groupMonitor.setHasStartupDependents(true);
    }
 else {
      groupMonitor.setHasStartupDependents(false);
    }
    groupMonitor.startScheduler();
  }
  finally {
    ApplicationHolder.releaseReadLock();
  }
  Group group=application.getGroupRecursively(context.getId());
  Collection<Instance> instances=parentMonitor.getInstances();
  for (  Instance instance : instances) {
    if (!instanceIds.contains(instance.getInstanceId())) {
      instanceIds.add(instance.getInstanceId());
    }
  }
  groupMonitor.createInstanceAndStartDependencyAtStartup(group,instanceIds);
  return groupMonitor;
}