Could not read search request unexpected index option – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.9

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Briefly, this error occurs when Elasticsearch receives a search request with an unexpected index option. This could be due to a typo, incorrect syntax, or use of an unsupported option in the search request. To resolve this issue, you should first verify the syntax of your search request. Make sure that the index option you’re using is supported and correctly spelled. If the problem persists, consider removing the index option from your request to see if it’s causing the issue.

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This guide will help you check for common problems that cause the log ” could not read search request. unexpected index option [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, plugin, request.

Log Context

Log “could not read search request. unexpected index option [” class name is WatcherSearchTemplateRequest.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (IGNORE_UNAVAILABLE_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 ignoreUnavailable = parser.booleanValue();
 } else if (ALLOW_NO_INDICES_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 allowNoIndices = parser.booleanValue();
 } else {
 throw new ElasticsearchParseException("could not read search request. unexpected index option [" +
 currentFieldName + "]");
 }
 } else {
 throw new ElasticsearchParseException("could not read search request. unexpected object field [" +
 currentFieldName + "]");

 

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