Analyser not found

[ronyarmon]

Hello, I'm running a search engine with Elasticsearch 6.5 using flask (Python) where documents were indexed with a synonym analyzer, but when installing the application on another server I cannot connect to the synonym file.
Running:

{"query": {"bool":{"must":[{"match":{"article":{"query":<query_term>,"fuzziness":"AUTO"}}}

I'm getting the search results.

However, when running the query with synonym:

{"query": {"bool":{"must":[{"match":{"article":{"query":<query_term>,"fuzziness":"AUTO","operator":"and","analyzer":"synonym"}}}]}}}

I'm getting:

RequestError (400, 'search_phase_execution_exception', '[match] analyzer [synonym] not found')

This is why I believe the problem is in accessing my synonym file.
Can you advise on tests I should run on this particular server to examine if that is the case or what could be the source for the problem?

[dadoonet (David Pilato)]

On which index are you running your search?

[ronyarmon]

The search is run with the ES plug in for Python as follows:

es=Elasticsearch()
res=es.search(index="all_articles_synonyms", body=query_as_json)

Documents were indexed in "all_articles_synonyms"
query_as_json= The jsons I quoted in the question

[dadoonet (David Pilato)]

Can you run the following in Kibana dev console?

GET all_articles_synonyms

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[ronyarmon]

Thanks for the comment and sorry for missing the formatting issue.
Did I answer your question about the index? Do you have an idea about why ES works differently on different servers?

[dadoonet (David Pilato)]

@ronyarmon

Did I answer your question about the index?

No. You did not answer this question:

Can you run the following in Kibana dev console?

GET all_articles_synonyms

[DavidT (David Taback)]

Thanks for the reminder. Rony is not available right now and he asked me to update this discussion.
Kibana is not installed on the system. I ran the query with curl with the following results:

{"all_articles_synonyms":{"aliases":{},"mappings":{"_doc":{"properties":{"address":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"article":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"title":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}}}}},"settings":{"index":{"creation_date":"1557043339055","number_of_shards":"5","number_of_replicas":"1","uuid":"MW6BiFAKTzyFnHGwDyTWag","version":{"created":"6060099"},"provided_name":"all_articles_synonyms"}}}}

I formatted the json of our query as below. Is it possible that the structure of the query is causing the problem. e.g "analyzer":"synonym" should not be in the place it is?

{
   "query":{
      "bool":{
         "must":[
            {
               "match":{
                  "article":{
                     "query":"blahblah",
                     "fuzziness":"AUTO",
                     "operator":"and",
                     "analyzer":"synonym"
                  }
               }
            }
         ]
      }
   }
}

Thanks in advance.

[dadoonet (David Pilato)]

As you can see you don't have a synonym analyzer defined in all_articles_synonyms index.

[DavidT (David Taback)]

Correct, I don't see the analyzer but it should be there as this is the json used to build it:
{
"settings":{
"index":{
"analysis":{
"analyzer":{
"synonym":{
"tokenizer":"whitespace",
"filter":[
"synonym"
]
}
},
"filter":{
"synonym":{
"type":"synonym",
"synonyms_path":"analysis/aaa_syn.txt"
}
}
}
}
}
}

The file exists in the config\analysis directory.
What am I doing wrong!

[dadoonet (David Pilato)]

I can't tell. I don't know how you created the index and what was elasticsearch response. Could you tell?

[DavidT (David Taback)]

As usual the simplest things are the last we try! I deleted the index and rebuilt it and it is now working.
Thank you for your very prompt and useful help!