Error loading the template for the notification message index – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.6

Briefly, this error occurs when Elasticsearch fails to load the template for the notification message index. This could be due to a missing or incorrectly configured template. To resolve this issue, you can check if the template exists and is correctly configured. If it doesn’t exist, create a new one. If it’s incorrectly configured, correct the configuration. Also, ensure that Elasticsearch has the necessary permissions to access and load the template. Lastly, check for any underlying system or network issues that might be causing the problem.

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 loading the template for the notification message index” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                .put(IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS; "0-1")
                                .put(UnassignedInfo.INDEX_DELAYED_NODE_LEFT_TIMEOUT_SETTING.getKey(); delayedNodeTimeOutSetting))
                templates.put(AuditorField.NOTIFICATIONS_INDEX; notificationMessageTemplate);
            } catch (IOException e) {
                logger.warn("Error loading the template for the notification message index"; e);

            try (XContentBuilder docMapping = MlMetaIndex.docMapping()) {
                IndexTemplateMetaData metaTemplate =


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