# Search with Synonyms do not to work **URL:** \ **Category:** Elasticsearch\ **Created:** [July 8, 2025, 12:13pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912 "2025-07-08T12:13:44Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![AndreAT](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andreat/32/140410_2.png) [@AndreAT](https://discuss.elastic.co/u/AndreAT)\ **Post date:** [July 8, 2025, 12:13pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/1 "2025-07-08T12:13:44Z")
Hi, with great assistence I was able to add own synonym file to my search. > [@Synonyms with FSCrawler](https://discuss.elastic.co/t/synonyms-with-fscrawler/379785): > > Hi, I like to use synonym\_path to assign a couple of synonyms to optimize my search. My enviroment is setup with Elasticsearch 8.15.1 and FSCrawler and after some study I figure out that I can't add mapping as done in common tuturials as there's already a mapper assigned (by FSCrawler I think). So when I try PUT /my\_index/\_mapping { "properties": { "content": { "type": "text", "analyzer": "my\_synonym\_analyzer" } } } I get an error { "error": { "root\_cause": [ … After updating the template I delete the index and use -restart to initial (as David mentioned). The settings now looking like this: ```auto { "component_templates": [ { "name": "fscrawler_settings_total_fields", "component_template": { "template": { "settings": { "index": { "mapping": { "total_fields": { "limit": "2000" } } } } } } }, { "name": "fscrawler_mapping_file", "component_template": { "template": { "mappings": { "properties": { "file": { "properties": { "extension": { "type": "keyword" }, "filename": { "store": true, "type": "keyword" }, "indexed_chars": { "type": "long" }, "last_accessed": { "format": "date_optional_time", "type": "date" }, "content_type": { "type": "keyword" }, "indexing_date": { "format": "date_optional_time", "type": "date" }, "created": { "format": "date_optional_time", "type": "date" }, "checksum": { "type": "keyword" }, "filesize": { "type": "long" }, "last_modified": { "format": "date_optional_time", "type": "date" }, "url": { "index": false, "type": "keyword" } } } } } } } }, { "name": "fscrawler_mapping_attributes", "component_template": { "template": { "mappings": { "properties": { "attributes": { "properties": { "owner": { "type": "keyword" }, "group": { "type": "keyword" } } } } } } } }, { "name": "fscrawler_mapping_path", "component_template": { "template": { "settings": { "index": { "analysis": { "analyzer": { "fscrawler_path": { "tokenizer": "fscrawler_path" } }, "tokenizer": { "fscrawler_path": { "type": "path_hierarchy" } } } } }, "mappings": { "properties": { "path": { "properties": { "virtual": { "type": "keyword", "fields": { "tree": { "fielddata": true, "analyzer": "fscrawler_path", "type": "text" }, "fulltext": { "type": "text" } } }, "root": { "type": "keyword" }, "real": { "type": "keyword", "fields": { "tree": { "fielddata": true, "analyzer": "fscrawler_path", "type": "text" }, "fulltext": { "type": "text" } } } } } } } } } }, { "name": "fscrawler_alias", "component_template": { "template": { "aliases": { "fscrawler": {} } } } }, { "name": "fscrawler_mapping_meta", "component_template": { "template": { "mappings": { "dynamic_templates": [ { "raw_as_text": { "path_match": "meta.raw.*", "mapping": { "type": "text", "fields": { "keyword": { "ignore_above": 256, "type": "keyword" } } } } } ], "properties": { "meta": { "properties": { "date": { "format": "date_optional_time", "type": "date" }, "altitude": { "type": "text" }, "keywords": { "type": "text" }, "modifier": { "type": "text" }, "latitude": { "type": "text" }, "rating": { "type": "byte" }, "description": { "type": "text" }, "language": { "type": "keyword" }, "source": { "type": "text" }, "title": { "type": "text" }, "creator_tool": { "type": "keyword" }, "type": { "type": "text" }, "relation": { "type": "text" }, "contributor": { "type": "text" }, "rights": { "type": "text" }, "metadata_date": { "format": "date_optional_time", "type": "date" }, "longitude": { "type": "text" }, "coverage": { "type": "text" }, "identifier": { "type": "text" }, "comments": { "type": "text" }, "author": { "type": "text" }, "created": { "format": "date_optional_time", "type": "date" }, "format": { "type": "text" }, "publisher": { "type": "text" }, "print_date": { "format": "date_optional_time", "type": "date" } } } } } } } }, { "name": "fscrawler_settings_shards", "component_template": { "template": { "settings": { "index": { "number_of_shards": "1" } } } } }, { "name": "fscrawler_mapping_content", "component_template": { "template": { "settings": { "index": { "analysis": { "filter": { "my_synonym_filter": { "type": "synonym", "synonyms_path": "synonyms.txt", "updateable": "true" } }, "analyzer": { "my_synonym_analyzer": { "filter": [ "lowercase", "my_synonym_filter" ], "tokenizer": "standard" } } } } } } } }, { "name": "fscrawler_mapping_attachment", "component_template": { "template": { "mappings": { "properties": { "attachment": { "type": "binary", "doc_values": false } } } } } } ] } ``` The file **synonyms.txt** is stored at **..\elasticsearch\config\synonyms.txt** and contains this sample: ```auto aws, amazon web service ``` But it has no effect. When I search **aws** I get: ```auto EC2, **AWS** EFS, **AWS** FSx, **AWS** ALB, **AWS** NLB, **AWS** Systems Manager, **AWS** Secrets Manager, **AWS** Parameter Store…., ``` But for my understanding should searching for amazon web service return at least something similar but it's complete different scoring: ```auto **web** services, and APIs using **Web** API. )….Proficient in **Web** Services, SOAP, XML, CSS, HTML5, AJAX and JavaScript.….Utilized contemporary design to create concise web sites for specific client needs.….Services (Facebook, Gmaps, Bing Maps, YouTube, Flickr, Panoramio, **Amazon** S3), etc. ``` Did I miss something or what can be the reason? Thanks, Andre ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 8, 2025, 12:38pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/2 "2025-07-08T12:38:46Z")
First, you need to test the `my_synonym_analyzer` analyzer to check how it behaves. This can be done by running the [\_analyze API](https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-analyze): ```auto GET /fscrawler/_analyze { "analyzer": "my_synonym_analyzer", "text": "AWS" } ``` ```auto GET /fscrawler/_analyze { "analyzer": "my_synonym_analyzer", "text": "Amazon Web Service" } ``` What are the outputs? But anyway, the component template is “wrong”: ```auto { "name": "fscrawler_mapping_content", "component_template": { "template": { "settings": { "index": { "analysis": { "filter": { "my_synonym_filter": { "type": "synonym", "synonyms_path": "synonyms.txt", "updateable": "true" } }, "analyzer": { "my_synonym_analyzer": { "filter": [ "lowercase", "my_synonym_filter" ], "tokenizer": "standard" } } } } } } } } ``` It should have this part which seems to be missing: ```auto "mappings": { "properties": { "content": { "type": "text", "analyzer": "my_synonym_analyzer" } } } } ``` Check what the final mapping is with: ```auto GET fscrawler/_mapping ``` ---
**Author:** ![AndreAT](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andreat/32/140410_2.png) [@AndreAT](https://discuss.elastic.co/u/AndreAT)\ **Post date:** [July 8, 2025, 1:03pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/3 "2025-07-08T13:03:27Z")
Hi again, the output looks good for my understanding: ```auto { "tokens": [ { "token": "aws", "start_offset": 0, "end_offset": 3, "type": "", "position": 0 }, { "token": "amazon", "start_offset": 0, "end_offset": 3, "type": "SYNONYM", "position": 0 }, { "token": "web", "start_offset": 0, "end_offset": 3, "type": "SYNONYM", "position": 1 }, { "token": "service", "start_offset": 0, "end_offset": 3, "type": "SYNONYM", "position": 2 } ] } { "tokens": [ { "token": "amazon", "start_offset": 0, "end_offset": 6, "type": "", "position": 0 }, { "token": "aws", "start_offset": 0, "end_offset": 18, "type": "SYNONYM", "position": 0, "positionLength": 3 }, { "token": "web", "start_offset": 7, "end_offset": 10, "type": "", "position": 1 }, { "token": "service", "start_offset": 11, "end_offset": 18, "type": "", "position": 2 } ] } ``` And these are the mappings: ```auto { "resumes": { "mappings": { "dynamic_templates": [ { "raw_as_text": { "path_match": "meta.raw.*", "mapping": { "fields": { "keyword": { "ignore_above": 256, "type": "keyword" } }, "type": "text" } } } ], "properties": { "attachment": { "type": "binary" }, "attributes": { "properties": { "group": { "type": "keyword" }, "owner": { "type": "keyword" } } }, "content": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "file": { "properties": { "checksum": { "type": "keyword" }, "content_type": { "type": "keyword" }, "created": { "type": "date", "format": "date_optional_time" }, "extension": { "type": "keyword" }, "filename": { "type": "keyword", "store": true }, "filesize": { "type": "long" }, "indexed_chars": { "type": "long" }, "indexing_date": { "type": "date", "format": "date_optional_time" }, "last_accessed": { "type": "date", "format": "date_optional_time" }, "last_modified": { "type": "date", "format": "date_optional_time" }, "url": { "type": "keyword", "index": false } } }, "meta": { "properties": { "altitude": { "type": "text" }, "author": { "type": "text" }, "comments": { "type": "text" }, "contributor": { "type": "text" }, "coverage": { "type": "text" }, "created": { "type": "date", "format": "date_optional_time" }, "creator_tool": { "type": "keyword" }, "date": { "type": "date", "format": "date_optional_time" }, "description": { "type": "text" }, "format": { "type": "text" }, "identifier": { "type": "text" }, "keywords": { "type": "text" }, "language": { "type": "keyword" }, "latitude": { "type": "text" }, "longitude": { "type": "text" }, "metadata_date": { "type": "date", "format": "date_optional_time" }, "modifier": { "type": "text" }, "print_date": { "type": "date", "format": "date_optional_time" }, "publisher": { "type": "text" }, "rating": { "type": "byte" }, "relation": { "type": "text" }, "rights": { "type": "text" }, "source": { "type": "text" }, "title": { "type": "text" }, "type": { "type": "text" } } }, "path": { "properties": { "real": { "type": "keyword", "fields": { "fulltext": { "type": "text" }, "tree": { "type": "text", "analyzer": "fscrawler_path", "fielddata": true } } }, "root": { "type": "keyword" }, "virtual": { "type": "keyword", "fields": { "fulltext": { "type": "text" }, "tree": { "type": "text", "analyzer": "fscrawler_path", "fielddata": true } } } } } } } } } ``` Of course I remember the part with missing bracket but after you solve it it response no error. Can I solve it in this way? ```auto PUT /my_index/_mapping { "properties": { "content": { "type": "text", "analyzer": "my_synonym_analyzer" } } } ``` ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 8, 2025, 1:51pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/4 "2025-07-08T13:51:46Z")
You need to delete the existing index and recreate it: ```auto DELETE fscrawler PUT fscrawler ``` If you still see the following when calling `GET fscrawler/_mapping`: ```json "content": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, ``` Then something is wrong. And it won’t work with synonyms as the analyzer is not properly set. ---
**Author:** ![AndreAT](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andreat/32/140410_2.png) [@AndreAT](https://discuss.elastic.co/u/AndreAT)\ **Post date:** [July 8, 2025, 2:49pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/5 "2025-07-08T14:49:13Z")
I think this is the issue. When I execute ```auto PUT _component_template/myindex_mapping_content { "template": { "settings": { "analysis": { "filter": { "my_synonym_filter": { "type": "synonym", "synonyms_set": "my-synonym-set", "updateable": true } }, "analyzer": { "my_synonym_analyzer": { "tokenizer": "standard", "filter": [ "lowercase", "my_synonym_filter" ] } } } }, "mappings": { "properties": { "content": { "type": "text", "analyzer": "my_synonym_analyzer" } } } } } ``` result is ```auto { "error": { "root_cause": [ { "type": "mapper_exception", "reason": "analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode." } ], "type": "mapper_parsing_exception", "reason": "Failed to parse mapping: analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode.", "caused_by": { "type": "mapper_exception", "reason": "analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode." } }, "status": 400 } ``` I can exclude ```auto "updateable": true ``` and result is ```auto { "acknowledged": true } ``` but when I execute **GET myindex/\_mapping** I still see ```auto "content": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, ``` ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 8, 2025, 6:57pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/6 "2025-07-08T18:57:56Z")
But did you run: ```auto DELETE myindex PUT myindex ``` ---
**Author:** ![AndreAT](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andreat/32/140410_2.png) [@AndreAT](https://discuss.elastic.co/u/AndreAT)\ **Post date:** [July 9, 2025, 9:59am UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/7 "2025-07-09T09:59:15Z")
That's it - I missed the PUT. So everything is fine, thank you once again. If you don't mind some questions to get it. What is the PUT for? After a DELETE a PUT looks a bit curious as I would expect that after a DELETE the index is deleted? The same with **PUT \_component\_template/myindex\_mapping\_content** and the error result: ```auto { "error": { "root_cause": [ { "type": "mapper_exception", "reason": "analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode." } ], "type": "mapper_parsing_exception", "reason": "Failed to parse mapping: analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode.", "caused_by": { "type": "mapper_exception", "reason": "analyzer [my_synonym_analyzer] contains filters [my_synonym_filter] that are not allowed to run in index time mode." } }, "status": 400 } ``` It runs fine now even if there'd been an error previously. Anyway I'm more than happy that it works now! ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 9, 2025, 2:17pm UTC](https://discuss.elastic.co/t/search-with-synonyms-do-not-to-work/379912/8 "2025-07-09T14:17:30Z")
> [@AndreAT](#): > > What is the PUT for? You don’t have to do this manually as anyway Elasticsearch will do it behind the scene when the first document is sent by FSCrawler. `PUT index`, creates the index.