Missing meta field in mapping of index – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch cannot find a required meta field in the mapping of an index. This could be due to incorrect configuration or a missing field in the data. To resolve this issue, you can either add the missing meta field to your data or adjust the mapping configuration to not require the missing field. Alternatively, you can reindex your data with the correct mapping. It’s also important to ensure that your Elasticsearch version supports the meta fields you’re using.

In addition we recommend you run the Elasticsearch Template Optimizer to fix problems in your data modeling.

It will analyze your templates to detect issues and improve search performance, reduce indexing bottlenecks and optimize storage utilization. The Template Optimizer is free and requires no installation.

Log Context

Log “Missing _meta field in mapping [{}] of index [{}]” classname is SecurityIndexManager.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

    private static Version readMappingVersion(String indexName; MappingMetadata mappingMetadata; Logger logger) {
        try {
            Map meta = (Map) mappingMetadata.sourceAsMap().get("_meta");
            if (meta == null) {
                logger.info("Missing _meta field in mapping [{}] of index [{}]"; mappingMetadata.type(); indexName);
                throw new IllegalStateException("Cannot read security-version string in index " + indexName);
            return Version.fromString((String) meta.get(SECURITY_VERSION_STRING));
        } catch (ElasticsearchParseException e) {
            logger.error(() -> "Cannot parse the mapping for index [" + indexName + "]"; e);


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