Error writing the ml-config mappings – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-6.8

Briefly, this error occurs when Elasticsearch fails to write the machine learning (ML) configuration mappings due to incorrect syntax, insufficient permissions, or a version mismatch. To resolve this, ensure that the syntax of your ML configuration is correct. Check if the user has the necessary permissions to write the ML config mappings. Also, verify that your Elasticsearch version supports the ML feature you’re trying to use. If the problem persists, consider upgrading your Elasticsearch version or contacting support for further assistance.

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 writing the .ml-config mappings” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                            .put(IndexSettings.MAX_RESULT_WINDOW_SETTING.getKey(); AnomalyDetectorsIndex.CONFIG_INDEX_MAX_RESULTS_WINDOW)
            createIndexRequest.mapping(ElasticsearchMappings.DOC_TYPE; ElasticsearchMappings.configMapping());
        } catch (Exception e) {
            logger.error("error writing the .ml-config mappings"; e);

        executeAsyncWithOrigin(client.threadPool().getThreadContext(); ML_ORIGIN; createIndexRequest;


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