Failed to create RescoreSearchContext – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch fails to create a context for rescoring search results, which is a process to improve the relevance of the top documents returned. This could be due to incorrect rescore query syntax, insufficient memory, or internal server issues. To resolve this, ensure your rescore query is correctly formatted and the server has enough resources. If the problem persists, consider checking the server logs for more detailed error information or restarting the Elasticsearch service.

This guide will help you check for common problems that cause the log ” failed to create RescoreSearchContext ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Log Context

Log “failed to create RescoreSearchContext” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 try {
 for (RescorerBuilder rescore : source.rescores()) {
 } catch (IOException e) {
 throw new SearchException(shardTarget; "failed to create RescoreSearchContext"; e);
 if (source.explain() != null) {


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