Cannot use collapse in conjunction with rescore – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when you try to use the `collapse` and `rescore` features together in an Elasticsearch query. Elasticsearch does not support using these two features simultaneously. To resolve this issue, you can either remove the `collapse` or `rescore` feature from your query. Alternatively, you can perform two separate queries, one with `collapse` and another with `rescore`, and then manually merge the results.

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This guide will help you check for common problems that cause the log ” cannot use `collapse` in conjunction with `rescore` ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Log Context

Log “cannot use `collapse` in conjunction with `rescore`” class name is SearchService.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (source.collapse() != null) {
 if (context.scrollContext() != null) {
 throw new SearchException(shardTarget; "cannot use `collapse` in a scroll context");
 }
 if (context.rescore() != null && context.rescore().isEmpty() == false) {
 throw new SearchException(shardTarget; "cannot use `collapse` in conjunction with `rescore`");
 }
 final CollapseContext collapseContext = source.collapse().build(searchExecutionContext);
 context.collapse(collapseContext);
 }

 

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