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"
}
}
}
}
}
}
}
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>"
}
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
}
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>"
}
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",
"start_offset" : 142,
"end_offset" : 144,
"type" : "CN_WORD",
"position" : 80
},
{
"token" : "组织",
"start_offset" : 144,
"end_offset" : 146,
"type" : "CN_WORD",
"position" : 81
},
{
"token" : "执行",
"start_offset" : 146,
"end_offset" : 148,
"type" : "CN_WORD",
"position" : 82
},
{
"token" : "小",
"start_offset" : 148,
"end_offset" : 149,
"type" : "CN_CHAR",
"position" : 83
},
{
"token" : "鹏",
"start_offset" : 149,
"end_offset" : 150,
"type" : "CN_CHAR",
"position" : 84
},
{
"token" : "汽车",
"start_offset" : 150,
"end_offset" : 152,
"type" : "CN_WORD",
"position" : 85
},
{
"token" : "一路",
"start_offset" : 153,
"end_offset" : 155,
"type" : "CN_WORD",
"position" : 86
},
{
"token" : "一",
"start_offset" : 153,
"end_offset" : 154,
"type" : "TYPE_CNUM",
"position" : 87
},
{
"token" : "路向",
"start_offset" : 154,
"end_offset" : 156,
"type" : "CN_WORD",
"position" : 88
},
{
"token" : "路",
"start_offset" : 154,
"end_offset" : 155,
"type" : "COUNT",
"position" : 89
},
{
"token" : "向北",
"start_offset" : 155,
"end_offset" : 157,
"type" : "CN_WORD",
"position" : 90
},
{
"token" : "品牌",
"start_offset" : 158,
"end_offset" : 160,
"type" : "CN_WORD",
"position" : 91
},
{
"token" : "事件",
"start_offset" : 160,
"end_offset" : 162,
"type" : "CN_WORD",
"position" : 92
},
{
"token" : "营销",
"start_offset" : 162,
"end_offset" : 164,
"type" : "CN_WORD",
"position" : 93
},
{
"token" : "通过",
"start_offset" : 165,
"end_offset" : 167,
"type" : "CN_WORD",
"position" : 94
},
{
"token" : "6",
"start_offset" : 168,
"end_offset" : 169,
"type" : "ARABIC",
"position" : 95
},
{
"token" : "天",
"start_offset" : 170,
"end_offset" : 171,
"type" : "CN_CHAR",
"position" : 96
},
{
"token" : "8",
"start_offset" : 172,
"end_offset" : 173,
"type" : "ARABIC",
"position" : 97
},
{
"token" : "人",
"start_offset" : 174,
"end_offset" : 175,
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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{
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{
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{
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{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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{
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{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
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},
{
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},
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},
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},
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},
{
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},
{
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},
{
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},
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},
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},
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},
{
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},
{
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},
{
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"type" : "CN_WORD",
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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"type" : "CN_WORD",
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},
{
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},
{
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"type" : "ENGLISH",
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},
{
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},
{
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"type" : "ENGLISH",
"position" : 375
},
{
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"position" : 376
},
{
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},
{
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},
{
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},
{
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"type" : "ARABIC",
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},
{
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"position" : 381
}
]
}
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"
}
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
}
]
}
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"
}
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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