Failed to apply settings – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch fails to apply new settings due to incorrect syntax, invalid values, or issues with the underlying system resources. To resolve this, first, verify the syntax and values of your settings. If they are correct, check if the system has enough resources (CPU, memory, disk space). If the issue persists, consider resetting to default settings or restarting the OpenSearch service. Lastly, ensure that the user has the necessary permissions to modify the settings.

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This guide will help you check for common problems that cause the log ” failed to apply settings ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: settings.

Log Context

Log “failed to apply settings” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            for (Runnable settingUpdater : applyRunnables) {
        } catch (Exception ex) {
            logger.warn("failed to apply settings"; ex);
            throw ex;
        return lastSettingsApplied = newSettings;


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