问题：

下面这个报错，是在配置同义词的时候报的错：不能识别南京。

{"error": {"root_cause": [{"type": "illegal_argument_exception","reason": "failed to build synonyms"}],"type": "illegal_argument_exception","reason": "failed to build synonyms","caused_by": {"type": "parse_exception","reason": "Invalid synonym rule at line 1","caused_by": {"type": "illegal_argument_exception","reason": "term: 南京 was completely eliminated by analyzer"}}},"status": 400
}

解决方式：

这是因为我在停止词里面配置“南京”这个词导致的。删除停止词库中的“南京”或者去除对应的同义词皆可。