Error during mapping check failing recovery – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch encounters an issue during the recovery process, specifically while checking the mapping of the index. This could be due to inconsistencies between the mapping on the primary and replica shards. To resolve this issue, you can try the following: 1) Delete and recreate the index with the correct mapping. 2) Use the Reindex API to create a new index with the correct mapping and reindex the data. 3) If the mapping conflict is due to a dynamic mapping, disable it and manually define the mapping.

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 “error during mapping check; failing recovery” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             public void run() throws InterruptedException {
        if (mappingCheckException.get() != null) {
            logger.warn("error during mapping check; failing recovery"; mappingCheckException.get());
            throw new ElasticsearchException("error during mapping check"; mappingCheckException.get());
        if (documentMappersToUpdate.isEmpty()) {


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