Briefly, this error occurs when Elasticsearch encounters an unexpected index option in the request. This could be due to a typo, incorrect syntax, or use of an option that doesn’t exist. To resolve this issue, you should first verify the index option used in your request. Make sure it is spelled correctly and follows the correct syntax. If the problem persists, check the Elasticsearch documentation to ensure the option is valid and supported in your version of Elasticsearch. If the option is deprecated or not supported, you will need to find an alternative.
This guide will help you check for common problems that cause the log ” could not read indices options. unexpected index option [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices.
Log Context
Log “could not read indices options. unexpected index option [” class name is IndicesOptions.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
} else if (ALLOW_NO_INDICES_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
allowNoIndices = parser.booleanValue();
} else if (IGNORE_THROTTLED_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
ignoreThrottled = parser.booleanValue();
} else {
throw new ElasticsearchParseException("could not read indices options. unexpected index option [" +
currentFieldName + "]");
}
} else {
throw new ElasticsearchParseException("could not read indices options. unexpected object field [" +
currentFieldName + "]");
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