Program: 1720
Project: 1720
Buggy source:
@Override public <E extends Event<Deployment>>void onAfterOperation(E event,List<ProcessingEvent> events) throws EventNotificationException {
  Deployment deployment2Delete=(Deployment)event.getPayload();
  ApplicationArchive archive=deployment2Delete.getApplicationArchive();
  Application app=deployment2Delete.getApplication();
  List<Deployment> deployments=archiveDeleteHandler.getModelManager().getModelService().findDeploymentsByApplicationArchive(archive);
  if (deployments.size() > 1) {
    return;
  }
  archiveDeleteNotifier.notify(new ModelEntityEvent(ModelServiceOperation.DELETE,archive),events);
  List<ApplicationVersion> versions=archiveDeleteHandler.getModelManager().getModelService().findVersionsByApplicationArchive(archive);
  if (versions.size() != 0) {
    return;
  }
  Map<String,Object> map=new HashMap<String,Object>();
  map.put("String_Node_Str",archive);
  try {
    int archivesWithHashAndAlg=archiveDeleteHandler.getModelManager().getModelService().countApplicationArchivesByHashAndHashAlg(archive.getHash(),archive.getHashAlgorithm());
    if (archivesWithHashAndAlg == 1) {
      GlobalSettings settings=archiveDeleteHandler.getModelManager().getGlobalSettings();
      archiveDeleteHandler.setFileSystemStoragePathPrefix(settings.getTemporaryStoragePath());
      archiveDeleteHandler.handle(new MapPayloadEvent(map));
    }
    archiveDeleteHandler.getModelManager().delete(archive,events);
  }
 catch (  EventHandlingException e) {
    throw new ClusterNotificationException("String_Node_Str",e);
  }
}

Fixed version (ground truth):
@Override public <E extends Event<Deployment>>void onAfterOperation(E event,List<ProcessingEvent> events) throws EventNotificationException {
  Deployment deployment2Delete=(Deployment)event.getPayload();
  ApplicationArchive archive=deployment2Delete.getApplicationArchive();
  List<Deployment> deployments=archiveDeleteHandler.getModelManager().getModelService().findDeploymentsByApplicationArchive(archive);
  if (deployments.size() != 0) {
    return;
  }
 else {
    int deplCount=archiveDeleteHandler.getModelManager().getModelService().countDeploymentsByHashAndHashAlg(archive.getHash(),archive.getHashAlgorithm());
    if (deplCount == 0) {
      archiveDeleteNotifier.notify(new ModelEntityEvent(ModelServiceOperation.DELETE,archive),events);
    }
  }
  List<ApplicationVersion> versions=archiveDeleteHandler.getModelManager().getModelService().findVersionsByApplicationArchive(archive);
  if (versions.size() != 0) {
    return;
  }
  Map<String,Object> map=new HashMap<String,Object>();
  map.put("String_Node_Str",archive);
  try {
    int archivesWithHashAndAlg=archiveDeleteHandler.getModelManager().getModelService().countApplicationArchivesByHashAndHashAlg(archive.getHash(),archive.getHashAlgorithm());
    if (archivesWithHashAndAlg == 1) {
      GlobalSettings settings=archiveDeleteHandler.getModelManager().getGlobalSettings();
      archiveDeleteHandler.setFileSystemStoragePathPrefix(settings.getTemporaryStoragePath());
      archiveDeleteHandler.handle(new MapPayloadEvent(map));
    }
    archiveDeleteHandler.getModelManager().delete(archive,events);
  }
 catch (  EventHandlingException e) {
    throw new ClusterNotificationException("String_Node_Str",e);
  }
}