Briefly, this error occurs when you try to overwrite a header setting in Elasticsearch that is not allowed to be changed. This is usually due to a misconfiguration in your Elasticsearch settings. To resolve this issue, you can either remove the offending setting from your configuration or replace it with a valid one. If you’re unsure about the correct setting, refer to the Elasticsearch documentation or consult with an Elasticsearch expert.
This guide will help you check for common problems that cause the log ” header cannot be overwritten via [” + concreteSetting.getKey() + name + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “header cannot be overwritten via [” + concreteSetting.getKey() + name + “]” class name is HttpExporter.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
final Listheaders = new ArrayList<>(); // record and validate each header as best we can for (final String name : names) { if (BLACKLISTED_HEADERS.contains(name)) { throw new SettingsException("header cannot be overwritten via [" + concreteSetting.getKey() + name + "]"); } final List values = headerSettings.getAsList(name); if (values.isEmpty()) {
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