Program: 6164
Project: 6164
Buggy source:
/** 
 * Deletes the specified namespace
 * @param namespaceId the {@link Id.Namespace} of the specified namespace
 * @throws NamespaceCannotBeDeletedException if the specified namespace cannot be deleted
 * @throws NamespaceNotFoundException if the specified namespace does not exist
 */
@Override public synchronized void delete(final Id.Namespace namespaceId) throws Exception {
  NamespaceId namespace=namespaceId.toEntityId();
  if (!exists(namespaceId)) {
    throw new NamespaceNotFoundException(namespaceId);
  }
  if (checkProgramsRunning(namespaceId.toEntityId())) {
    throw new NamespaceCannotBeDeletedException(namespaceId,String.format("String_Node_Str" + "String_Node_Str",namespaceId));
  }
  authorizerInstantiatorService.get().enforce(namespace,SecurityRequestContext.toPrincipal(),Action.ADMIN);
  authorizerInstantiatorService.get().revoke(namespace);
  LOG.info("String_Node_Str",namespaceId);
  try {
    preferencesStore.deleteProperties(namespaceId.getId());
    dashboardStore.delete(namespaceId.getId());
    applicationLifecycleService.removeAll(namespaceId);
    scheduler.deleteAllSchedules(namespaceId);
    dsFramework.deleteAllInstances(namespaceId);
    dsFramework.deleteAllModules(namespaceId);
    queueAdmin.dropAllInNamespace(namespaceId);
    streamAdmin.dropAllInNamespace(namespaceId);
    store.removeAll(namespaceId);
    deleteMetrics(namespaceId.toEntityId());
    artifactRepository.clear(namespaceId.toEntityId());
    if (!Id.Namespace.DEFAULT.equals(namespaceId)) {
      nsStore.delete(namespaceId);
      dsFramework.deleteNamespace(namespaceId);
    }
  }
 catch (  Exception e) {
    LOG.warn("String_Node_Str",namespaceId,e);
    throw new NamespaceCannotBeDeletedException(namespaceId,e);
  }
  LOG.info("String_Node_Str",namespaceId);
}

Fixed version (ground truth):
/** 
 * Deletes the specified namespace
 * @param namespaceId the {@link Id.Namespace} of the specified namespace
 * @throws NamespaceCannotBeDeletedException if the specified namespace cannot be deleted
 * @throws NamespaceNotFoundException if the specified namespace does not exist
 */
@Override public synchronized void delete(final Id.Namespace namespaceId) throws Exception {
  NamespaceId namespace=namespaceId.toEntityId();
  if (!exists(namespaceId)) {
    throw new NamespaceNotFoundException(namespaceId);
  }
  if (checkProgramsRunning(namespaceId.toEntityId())) {
    throw new NamespaceCannotBeDeletedException(namespaceId,String.format("String_Node_Str" + "String_Node_Str",namespaceId));
  }
  authorizerInstantiator.get().enforce(namespace,SecurityRequestContext.toPrincipal(),Action.ADMIN);
  authorizerInstantiator.get().revoke(namespace);
  LOG.info("String_Node_Str",namespaceId);
  try {
    preferencesStore.deleteProperties(namespaceId.getId());
    dashboardStore.delete(namespaceId.getId());
    applicationLifecycleService.removeAll(namespaceId);
    scheduler.deleteAllSchedules(namespaceId);
    dsFramework.deleteAllInstances(namespaceId);
    dsFramework.deleteAllModules(namespaceId);
    queueAdmin.dropAllInNamespace(namespaceId);
    streamAdmin.dropAllInNamespace(namespaceId);
    store.removeAll(namespaceId);
    deleteMetrics(namespaceId.toEntityId());
    artifactRepository.clear(namespaceId.toEntityId());
    if (!Id.Namespace.DEFAULT.equals(namespaceId)) {
      nsStore.delete(namespaceId);
      dsFramework.deleteNamespace(namespaceId);
    }
  }
 catch (  Exception e) {
    LOG.warn("String_Node_Str",namespaceId,e);
    throw new NamespaceCannotBeDeletedException(namespaceId,e);
  }
  LOG.info("String_Node_Str",namespaceId);
}