Not able to change "maxClauseCount" value in elastic search

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unwilling to change synonym
word meaning resistant to change
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I am using ES 5.2.0 and I got below exception during some query execution:

 Caused by: NotSerializableExceptionWrapper[too_many_clauses: maxClauseCount is set to 1024]
    at org.elasticsearch.index.query.BoolQueryBuilder.addBooleanClauses(
    at org.elasticsearch.index.query.BoolQueryBuilder.doToQuery(

To solve this. I am trying to change "indices.query.bool.max_clause_count" value by running below query


PUT http://localhost:9200/_all/_settings?preserve_existing=true  
{"indices.query.bool.max_clause_count" : "100000"}


  "error": {
    "root_cause": [
        "type": "remote_transport_exception",
        "reason": "[06LrSZC][localhost:9300][indices:admin/settings/update]"
    "type": "illegal_argument_exception",
    "reason": "unknown setting [index.indices.query.bool.max_clause_count] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
  "status": 400

References I used to solve but couldn't:

Please let me know the correct request JSON to do this.

indices.query.bool.max_clause_count is a static setting so you should set it in elasticsearch.yml file in each and every node of elasticsearch cluster. You must restart the cluster.

Update your elasticsearch.yml file with following line:

indices.query.bool.max_clause_count: 100000

Note: Only dynamic settings can be updated with API

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That is a global setting, not index level one and its place is in elasticsearch.yml file:

indices.query.bool.max_clause_count: 10000

That's why it was also renamed from index (singular) to indices (plural).

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Another possibly better way to look at list is just reduce the amount of mustNots to a single must not with multiple terms. This will count as a single mustNot and it will not trigger the exception, allowing you to keep the limit of Clauses which might be required in other places in your application. For example the code above will get a list of airportCode and "mustNot" them one at a time

// adding the blacklisted carriers to the query
    .forEach(airportCode-> boolQueryBuilder.mustNot(QueryBuilders
        .matchQuery("airportcodes.raw", airportCode)));

Whereas the code above will do the same but in a single mustNot, and it wont trigger the tooManyClauses

QueryBuilder termsQueryBuilder = QueryBuilders
    .termsQuery("airportcodes.raw", BannedAirportCodeCache.instance().getAirportCodes());

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