Drupal 7 Solr索引错误，显示“0”；EntityFormedException:类型为taxonomy的实体上缺少bundle属性“U term”；

在Drupal 7.14中，当我为整个站点编制索引时，Solr显示以下错误：

AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. 
Path: /batch?id=1938&op=do StatusText: Service unavailable (with message)
ResponseText: EntityMalformedException: Missing bundle property on entity of type taxonomy_term. in entity_extract_ids() (line 7539 of /project/path/includes/common.inc).

因此，当我查看

/includes/common.inc

中的行时（大约行：7537）：

• 请问这段代码（在

  common.inc

  中）实际上在做什么
• 我怎样才能克服这个错误

请尝试此模块，它将删除所有空捆绑包

// Explicitly fail for malformed entities missing the bundle property.
if (!isset($entity->{$info['entity keys']['bundle']}) || $entity->{$info['entity keys']['bundle']} === '') {
  throw new EntityMalformedException(t('Missing bundle property on entity of type @entity_type.', array('@entity_type' => $entity_type)));
}