验证ElasticSearch 分词的BUG_filter": ["lowercase", "asciifolding"] 不能写入中文

验证ElasticSearch 分词的BUG

环境介绍

ElasticSearch 版本号: 6.7.0

BUG 重现

创建测试案例索引

PUT test_2022
{
  "settings": {
    "analysis": {
      "filter": {
        "pinyin_filter": {
          "type": "pinyin"
        }
      },
      "analyzer": {
        "custome_standard": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        },
        "custome_chinese": {
          "type": "custom",
          "tokenizer": "ik_max_word",
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        },
        "custome_chinese_search":{
          "type": "custom",
          "tokenizer": "ik_smart",
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        }
      },
      "normalizer": {
        "custome_normalizer": {
          "type": "custom",
          "char_filter": [],
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        }
      }
    },
    "index.mapping.coerce": false,
    "index.mapping.ignore_malformed":false,
    "number_of_shards" : 5,
    "number_of_replicas" : 1
  },
  "mappings": {
    "_doc": {
      "properties": {
        "id": {
          "type": "long"
        },
        "workContent": {
              "type": "text",
              "analyzer": "custome_standard",
              "fields": {
                "raw": {
                  "type": "keyword",
                  "normalizer": "custome_normalizer"
                },
                "chinese": {
                  "type": "text",
                  "analyzer": "custome_chinese",
                  "search_analyzer":"custome_chinese_search"
                }
              }
        }
      }
    }
  }
}
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执行导致异常的BUG命令

POST test_2022/_doc/1
{
  "id": 1,
  "workContent": "<span>0-1冷启动阶段，构建小鹏汽车社群营销体系，通过内容营销、活动营销两只抓手吸引沉淀潜在车主。结合公司重大传播节点，策划事件营销活动占领用户心智，在 G3 未上市之前进行品牌产品背书，提高潜客对产品的信任度。<br> <br>业绩荣誉： <br>1、配合 G3 发布会节奏，策划组织执行小鹏汽车《一路向北》品牌事件营销，通过 6 天 8 人 2553 公里的极客朝圣之旅，为小鹏汽车制造品质背书，铺垫口碑。这是国内新造车 势力的超长途自驾第一测。视频分别于小鹏汽车品牌媒体发布会、G3 发布会何小鹏讲演前及小鹏汽车各城市端展厅播放，获得行业及公司内部好评，相关链接： <br>A、外部视频链接：https://chejiahao.autohome.com.cn/info/2290990 <br>B、内部报道链接：https://mp.weixin.qq.com/s/A2AfghYRJ8Hc2gMMr_C8dQ <br> <br>2、配合 G3 发布会节奏，联合汽车之家资源组织策划《G3 价格竞猜》项目。该项目以极底成本，获得较好的曝光声量及活动参与效果。项目外部论坛总点击量环比 增长 108.9%，总回复数环比增长 97.3% ，成果如下：<br>A、新闻曝光举例：https://www.autohome.com.cn/news/201804/915688.html <br>B、论坛活动地址： https://club.autohome.com.cn/bbs/thread/7fc721404489d922/72434411-1.html <br> <br>3、撰写原创内容作品，抢占汽车之家首页首屏文字链和论坛相关位置，争取免费露出位：<br>A、小鹏汽车 1.0 评测：宝剑锋从磨砺出 https://chejiahao.autohome.com.cn/info/2239269 <br>B、一路向北 小鹏汽车广州-北京自驾游记 https://chejiahao.autohome.com.cn/info/2290598 </span>"
  
}
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执行结果

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "startOffset must be non-negative, and endOffset must be >= startOffset, and offsets must not go backwards startOffset=750,endOffset=751,lastStartOffset=751 for field 'workContent.chinese'"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "startOffset must be non-negative, and endOffset must be >= startOffset, and offsets must not go backwards startOffset=750,endOffset=751,lastStartOffset=751 for field 'workContent.chinese'"
  },
  "status": 400
}
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BUG分析

从错误的描述可以得出，应该是分词出现了异常，因此手动用字段的分词配置来对文本进行分词，找出异常的文本内容。

查询字段分词结果，定位异常的文本内容

将待分词的内容用指定字段执行分词处理，获取分词结果

POST test_2022/_analyze
{
  "field": "workContent.chinese",
  "text": "<span>0-1冷启动阶段，构建小鹏汽车社群营销体系，通过内容营销、活动营销两只抓手吸引沉淀潜在车主。结合公司重大传播节点，策划事件营销活动占领用户心智，在 G3 未上市之前进行品牌产品背书，提高潜客对产品的信任度。<br> <br>业绩荣誉： <br>1、配合 G3 发布会节奏，策划组织执行小鹏汽车《一路向北》品牌事件营销，通过 6 天 8 人 2553 公里的极客朝圣之旅，为小鹏汽车制造品质背书，铺垫口碑。这是国内新造车 势力的超长途自驾第一测。视频分别于小鹏汽车品牌媒体发布会、G3 发布会何小鹏讲演前及小鹏汽车各城市端展厅播放，获得行业及公司内部好评，相关链接： <br>A、外部视频链接：https://chejiahao.autohome.com.cn/info/2290990 <br>B、内部报道链接：https://mp.weixin.qq.com/s/A2AfghYRJ8Hc2gMMr_C8dQ <br> <br>2、配合 G3 发布会节奏，联合汽车之家资源组织策划《G3 价格竞猜》项目。该项目以极底成本，获得较好的曝光声量及活动参与效果。项目外部论坛总点击量环比 增长 108.9%，总回复数环比增长 97.3% ，成果如下：<br>A、新闻曝光举例：https://www.autohome.com.cn/news/201804/915688.html <br>B、论坛活动地址： https://club.autohome.com.cn/bbs/thread/7fc721404489d922/72434411-1.html <br> <br>3、撰写原创内容作品，抢占汽车之家首页首屏文字链和论坛相关位置，争取免费露出位：<br>A、小鹏汽车 1.0 评测：宝剑锋从磨砺出 https://chejiahao.autohome.com.cn/info/2239269 <br>B、一路向北 小鹏汽车广州-北京自驾游记 https://chejiahao.autohome.com.cn/info/2290598 </span>"
  
}
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分词的结果为：

{
  "tokens" : [
    {
      "token" : "span",
      "start_offset" : 1,
      "end_offset" : 5,
      "type" : "ENGLISH",
      "position" : 0
    },
    {
      "token" : "0-1",
      "start_offset" : 6,
      "end_offset" : 9,
      "type" : "LETTER",
      "position" : 1
    },
    {
      "token" : "0",
      "start_offset" : 6,
      "end_offset" : 7,
      "type" : "ARABIC",
      "position" : 2
    },
    {
      "token" : "1",
      "start_offset" : 8,
      "end_offset" : 9,
      "type" : "ARABIC",
      "position" : 3
    },
    {
      "token" : "冷启动",
      "start_offset" : 9,
      "end_offset" : 12,
      "type" : "CN_WORD",
      "position" : 4
    },
    {
      "token" : "冷",
      "start_offset" : 9,
      "end_offset" : 10,
      "type" : "CN_CHAR",
      "position" : 5
    },
    {
      "token" : "启动",
      "start_offset" : 10,
      "end_offset" : 12,
      "type" : "CN_WORD",
      "position" : 6
    },
    {
      "token" : "阶段",
      "start_offset" : 12,
      "end_offset" : 14,
      "type" : "CN_WORD",
      "position" : 7
    },
    {
      "token" : "构建",
      "start_offset" : 15,
      "end_offset" : 17,
      "type" : "CN_WORD",
      "position" : 8
    },
    {
      "token" : "小",
      "start_offset" : 17,
      "end_offset" : 18,
      "type" : "CN_CHAR",
      "position" : 9
    },
    {
      "token" : "鹏",
      "start_offset" : 18,
      "end_offset" : 19,
      "type" : "CN_CHAR",
      "position" : 10
    },
    {
      "token" : "汽车",
      "start_offset" : 19,
      "end_offset" : 21,
      "type" : "CN_WORD",
      "position" : 11
    },
    {
      "token" : "社群",
      "start_offset" : 21,
      "end_offset" : 23,
      "type" : "CN_WORD",
      "position" : 12
    },
    {
      "token" : "营销",
      "start_offset" : 23,
      "end_offset" : 25,
      "type" : "CN_WORD",
      "position" : 13
    },
    {
      "token" : "体系",
      "start_offset" : 25,
      "end_offset" : 27,
      "type" : "CN_WORD",
      "position" : 14
    },
    {
      "token" : "通过",
      "start_offset" : 28,
      "end_offset" : 30,
      "type" : "CN_WORD",
      "position" : 15
    },
    {
      "token" : "内容",
      "start_offset" : 30,
      "end_offset" : 32,
      "type" : "CN_WORD",
      "position" : 16
    },
    {
      "token" : "营销",
      "start_offset" : 32,
      "end_offset" : 34,
      "type" : "CN_WORD",
      "position" : 17
    },
    {
      "token" : "活动",
      "start_offset" : 35,
      "end_offset" : 37,
      "type" : "CN_WORD",
      "position" : 18
    },
    {
      "token" : "营销",
      "start_offset" : 37,
      "end_offset" : 39,
      "type" : "CN_WORD",
      "position" : 19
    },
    {
      "token" : "两只",
      "start_offset" : 39,
      "end_offset" : 41,
      "type" : "CN_WORD",
      "position" : 20
    },
    {
      "token" : "两",
      "start_offset" : 39,
      "end_offset" : 40,
      "type" : "COUNT",
      "position" : 21
    },
    {
      "token" : "只",
      "start_offset" : 40,
      "end_offset" : 41,
      "type" : "CN_CHAR",
      "position" : 22
    },
    {
      "token" : "抓手",
      "start_offset" : 41,
      "end_offset" : 43,
      "type" : "CN_WORD",
      "position" : 23
    },
    {
      "token" : "吸引",
      "start_offset" : 43,
      "end_offset" : 45,
      "type" : "CN_WORD",
      "position" : 24
    },
    {
      "token" : "沉淀",
      "start_offset" : 45,
      "end_offset" : 47,
      "type" : "CN_WORD",
      "position" : 25
    },
    {
      "token" : "潜在",
      "start_offset" : 47,
      "end_offset" : 49,
      "type" : "CN_WORD",
      "position" : 26
    },
    {
      "token" : "潜",
      "start_offset" : 47,
      "end_offset" : 48,
      "type" : "CN_CHAR",
      "position" : 27
    },
    {
      "token" : "在车",
      "start_offset" : 48,
      "end_offset" : 50,
      "type" : "CN_WORD",
      "position" : 28
    },
    {
      "token" : "车主",
      "start_offset" : 49,
      "end_offset" : 51,
      "type" : "CN_WORD",
      "position" : 29
    },
    {
      "token" : "结合",
      "start_offset" : 52,
      "end_offset" : 54,
      "type" : "CN_WORD",
      "position" : 30
    },
    {
      "token" : "公司",
      "start_offset" : 54,
      "end_offset" : 56,
      "type" : "CN_WORD",
      "position" : 31
    },
    {
      "token" : "重大",
      "start_offset" : 56,
      "end_offset" : 58,
      "type" : "CN_WORD",
      "position" : 32
    },
    {
      "token" : "传播",
      "start_offset" : 58,
      "end_offset" : 60,
      "type" : "CN_WORD",
      "position" : 33
    },
    {
      "token" : "节点",
      "start_offset" : 60,
      "end_offset" : 62,
      "type" : "CN_WORD",
      "position" : 34
    },
    {
      "token" : "策划",
      "start_offset" : 63,
      "end_offset" : 65,
      "type" : "CN_WORD",
      "position" : 35
    },
    {
      "token" : "事件",
      "start_offset" : 65,
      "end_offset" : 67,
      "type" : "CN_WORD",
      "position" : 36
    },
    {
      "token" : "营销",
      "start_offset" : 67,
      "end_offset" : 69,
      "type" : "CN_WORD",
      "position" : 37
    },
    {
      "token" : "活动",
      "start_offset" : 69,
      "end_offset" : 71,
      "type" : "CN_WORD",
      "position" : 38
    },
    {
      "token" : "占领",
      "start_offset" : 71,
      "end_offset" : 73,
      "type" : "CN_WORD",
      "position" : 39
    },
    {
      "token" : "占",
      "start_offset" : 71,
      "end_offset" : 72,
      "type" : "CN_CHAR",
      "position" : 40
    },
    {
      "token" : "领用",
      "start_offset" : 72,
      "end_offset" : 74,
      "type" : "CN_WORD",
      "position" : 41
    },
    {
      "token" : "用户",
      "start_offset" : 73,
      "end_offset" : 75,
      "type" : "CN_WORD",
      "position" : 42
    },
    {
      "token" : "心智",
      "start_offset" : 75,
      "end_offset" : 77,
      "type" : "CN_WORD",
      "position" : 43
    },
    {
      "token" : "在",
      "start_offset" : 78,
      "end_offset" : 79,
      "type" : "CN_CHAR",
      "position" : 44
    },
    {
      "token" : "g3",
      "start_offset" : 80,
      "end_offset" : 82,
      "type" : "LETTER",
      "position" : 45
    },
    {
      "token" : "g",
      "start_offset" : 80,
      "end_offset" : 81,
      "type" : "ENGLISH",
      "position" : 46
    },
    {
      "token" : "3",
      "start_offset" : 81,
      "end_offset" : 82,
      "type" : "ARABIC",
      "position" : 47
    },
    {
      "token" : "未上市",
      "start_offset" : 83,
      "end_offset" : 86,
      "type" : "CN_WORD",
      "position" : 48
    },
    {
      "token" : "未上",
      "start_offset" : 83,
      "end_offset" : 85,
      "type" : "CN_WORD",
      "position" : 49
    },
    {
      "token" : "上市",
      "start_offset" : 84,
      "end_offset" : 86,
      "type" : "CN_WORD",
      "position" : 50
    },
    {
      "token" : "之前",
      "start_offset" : 86,
      "end_offset" : 88,
      "type" : "CN_WORD",
      "position" : 51
    },
    {
      "token" : "之",
      "start_offset" : 86,
      "end_offset" : 87,
      "type" : "CN_CHAR",
      "position" : 52
    },
    {
      "token" : "前进",
      "start_offset" : 87,
      "end_offset" : 89,
      "type" : "CN_WORD",
      "position" : 53
    },
    {
      "token" : "进行",
      "start_offset" : 88,
      "end_offset" : 90,
      "type" : "CN_WORD",
      "position" : 54
    },
    {
      "token" : "品牌",
      "start_offset" : 90,
      "end_offset" : 92,
      "type" : "CN_WORD",
      "position" : 55
    },
    {
      "token" : "产品",
      "start_offset" : 92,
      "end_offset" : 94,
      "type" : "CN_WORD",
      "position" : 56
    },
    {
      "token" : "背书",
      "start_offset" : 94,
      "end_offset" : 96,
      "type" : "CN_WORD",
      "position" : 57
    },
    {
      "token" : "提高",
      "start_offset" : 97,
      "end_offset" : 99,
      "type" : "CN_WORD",
      "position" : 58
    },
    {
      "token" : "潜",
      "start_offset" : 99,
      "end_offset" : 100,
      "type" : "CN_CHAR",
      "position" : 59
    },
    {
      "token" : "客",
      "start_offset" : 100,
      "end_offset" : 101,
      "type" : "CN_CHAR",
      "position" : 60
    },
    {
      "token" : "对",
      "start_offset" : 101,
      "end_offset" : 102,
      "type" : "CN_CHAR",
      "position" : 61
    },
    {
      "token" : "产品",
      "start_offset" : 102,
      "end_offset" : 104,
      "type" : "CN_WORD",
      "position" : 62
    },
    {
      "token" : "的",
      "start_offset" : 104,
      "end_offset" : 105,
      "type" : "CN_CHAR",
      "position" : 63
    },
    {
      "token" : "信任",
      "start_offset" : 105,
      "end_offset" : 107,
      "type" : "CN_WORD",
      "position" : 64
    },
    {
      "token" : "度",
      "start_offset" : 107,
      "end_offset" : 108,
      "type" : "CN_CHAR",
      "position" : 65
    },
    {
      "token" : "br",
      "start_offset" : 110,
      "end_offset" : 112,
      "type" : "ENGLISH",
      "position" : 66
    },
    {
      "token" : "br",
      "start_offset" : 115,
      "end_offset" : 117,
      "type" : "ENGLISH",
      "position" : 67
    },
    {
      "token" : "业绩",
      "start_offset" : 118,
      "end_offset" : 120,
      "type" : "CN_WORD",
      "position" : 68
    },
    {
      "token" : "荣誉",
      "start_offset" : 120,
      "end_offset" : 122,
      "type" : "CN_WORD",
      "position" : 69
    },
    {
      "token" : "br",
      "start_offset" : 125,
      "end_offset" : 127,
      "type" : "ENGLISH",
      "position" : 70
    },
    {
      "token" : "1",
      "start_offset" : 128,
      "end_offset" : 129,
      "type" : "ARABIC",
      "position" : 71
    },
    {
      "token" : "配合",
      "start_offset" : 130,
      "end_offset" : 132,
      "type" : "CN_WORD",
      "position" : 72
    },
    {
      "token" : "g3",
      "start_offset" : 133,
      "end_offset" : 135,
      "type" : "LETTER",
      "position" : 73
    },
    {
      "token" : "g",
      "start_offset" : 133,
      "end_offset" : 134,
      "type" : "ENGLISH",
      "position" : 74
    },
    {
      "token" : "3",
      "start_offset" : 134,
      "end_offset" : 135,
      "type" : "ARABIC",
      "position" : 75
    },
    {
      "token" : "发布会",
      "start_offset" : 136,
      "end_offset" : 139,
      "type" : "CN_WORD",
      "position" : 76
    },
    {
      "token" : "发布",
      "start_offset" : 136,
      "end_offset" : 138,
      "type" : "CN_WORD",
      "position" : 77
    },
    {
      "token" : "会",
      "start_offset" : 138,
      "end_offset" : 139,
      "type" : "CN_CHAR",
      "position" : 78
    },
    {
      "token" : "节奏",
      "start_offset" : 139,
      "end_offset" : 141,
      "type" : "CN_WORD",
      "position" : 79
    },
    {
      "token" : "策划",
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其中有问题的点：

对应文本内容：

尝试修改文本内容，测试问题是否消失

删除文本中宝剑锋从磨砺出中的从字，再次执行，发现异常消失，内容可以正常分词。

尝试缩短文本，测试问题是否消失

POST test_2022/_analyze
{
  "field": "workContent.chinese",
  "text": "宝剑锋从磨砺出"
  
}
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6

测试结果:

{
  "tokens" : [
    {
      "token" : "宝剑锋从磨砺出",
      "start_offset" : 0,
      "end_offset" : 7,
      "type" : "CN_WORD",
      "position" : 0
    },
    {
      "token" : "宝剑锋",
      "start_offset" : 0,
      "end_offset" : 3,
      "type" : "CN_WORD",
      "position" : 1
    },
    {
      "token" : "宝剑",
      "start_offset" : 0,
      "end_offset" : 2,
      "type" : "CN_WORD",
      "position" : 2
    },
    {
      "token" : "从",
      "start_offset" : 3,
      "end_offset" : 4,
      "type" : "CN_CHAR",
      "position" : 3
    },
    {
      "token" : "锋",
      "start_offset" : 2,
      "end_offset" : 3,
      "type" : "CN_CHAR",
      "position" : 4
    },
    {
      "token" : "从",
      "start_offset" : 3,
      "end_offset" : 4,
      "type" : "CN_CHAR",
      "position" : 5
    },
    {
      "token" : "磨砺",
      "start_offset" : 4,
      "end_offset" : 6,
      "type" : "CN_WORD",
      "position" : 6
    },
    {
      "token" : "出",
      "start_offset" : 6,
      "end_offset" : 7,
      "type" : "CN_CHAR",
      "position" : 7
    }
  ]
}

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测试发现问题依然出现，说明问题和文本长度无关，仅仅只是因为这个一小段文本引起的。

进一步缩写异常文本范围

测试发现宝剑锋从磨砺出 已经是最短的能触发异常的文本了。

深入调研BUG的原因

BUG解决方案

方案1 上传自定义的分词库

将宝剑锋从磨砺出 设置为独立的分词，不再智能拆分。

新建一个extend.dic 的文本文件，里面添加一行内容宝剑锋从磨砺出 。
将文件放入Es安装目录，并修改IKAnalyzer.cfg.xml 文件，增加扩展字典配置。重启ES实例就可以。
已经创建的索引需要重新创建，否则分词不生效。

如果是阿里云的ES服务器，则直接使用阿里云的热更新 即可（IK热更新首次触发重启，之后更新同名词典底层不会触发重启。）。

实例重启后，重建索引，再次测试验证

POST test_2022/_analyze
{
  "field": "workContent.chinese",
  "text": "宝剑锋从磨砺出"
  
}
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3
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5
6

测试结果:

{
  "tokens" : [
    {
      "token" : "宝剑锋从磨砺出",
      "start_offset" : 0,
      "end_offset" : 7,
      "type" : "CN_WORD",
      "position" : 0
    },
    {
      "token" : "宝剑锋",
      "start_offset" : 0,
      "end_offset" : 3,
      "type" : "CN_WORD",
      "position" : 1
    },
    {
      "token" : "宝剑",
      "start_offset" : 0,
      "end_offset" : 2,
      "type" : "CN_WORD",
      "position" : 2
    },
    {
      "token" : "锋",
      "start_offset" : 2,
      "end_offset" : 3,
      "type" : "CN_CHAR",
      "position" : 3
    },
    {
      "token" : "从",
      "start_offset" : 3,
      "end_offset" : 4,
      "type" : "CN_CHAR",
      "position" : 4
    },
    {
      "token" : "磨砺",
      "start_offset" : 4,
      "end_offset" : 6,
      "type" : "CN_WORD",
      "position" : 5
    },
    {
      "token" : "出",
      "start_offset" : 6,
      "end_offset" : 7,
      "type" : "CN_CHAR",
      "position" : 6
    }
  ]
}

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