Could not read indices options unexpected object field currentFieldName – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.16-8.9

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Briefly, this error occurs when Elasticsearch encounters an unexpected field in the indices options. This could be due to a typo, incorrect formatting, or an unsupported field in the indices options. To resolve this issue, you should first verify the field names and their formats in your indices options. Ensure they are correctly spelled and supported by your Elasticsearch version. If the error persists, consider removing or commenting out the problematic field to isolate the issue.

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This guide will help you check for common problems that cause the log ” could not read indices options. unexpected object field [” + currentFieldName + “] ” 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 object field [” + currentFieldName + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 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 + "]");
 }  if (wildcardStates == null) {
 throw new ElasticsearchParseException("indices options xcontent did not contain " + EXPAND_WILDCARDS_FIELD.getPreferredName());


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