Malformed setting override value – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.2-8.9

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Briefly, this error occurs when the value provided for a setting in Elasticsearch is not in the correct format or syntax. This could be due to a typo, incorrect data type, or missing required parameters. To resolve this issue, you should first verify the syntax and format of your settings. Ensure that the data types match what is expected (e.g., string, integer, boolean). Also, check if all required parameters are provided. If the error persists, consider resetting to default settings and reconfiguring one by one to identify the problematic setting.

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This guide will help you check for common problems that cause the log ” Malformed setting override value ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: node.

Log Context

Log “Malformed setting override value” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 var is = new ByteArrayInputStream(builder.toString().getBytes(StandardCharsets.UTF_8));
 // fake the resource name so it loads yaml
 try {
 output.loadFromStream("overrides.yml"; is; false);
 } catch (IOException e) {
 throw new SettingsException("Malformed setting override value"; e);
 }  private static void replaceForcedSettings(Settings.Builder output) {
 List forcedSettings = new ArrayList<>();


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