Briefly, this error occurs when there is inconsistency in the use of HTTP or HTTPS in the configuration key. Elasticsearch requires a consistent scheme for all URLs. To resolve this, ensure that all URLs in your configuration use the same scheme, either HTTP or HTTPS. If some services require HTTPS, it’s recommended to use HTTPS for all to maintain consistency and security. Also, check for typos or incorrect URLs in your configuration.
This guide will help you check for common problems that cause the log ” [” + configKey + “] must use a consistent scheme: http or https ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “[” + configKey + “] must use a consistent scheme: http or https” class name is HttpExporter.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
httpsHostFound = true;
} // fail if we find them configuring the scheme/protocol in different ways
if (httpHostFound && httpsHostFound) {
throw new SettingsException("[" + configKey + "] must use a consistent scheme: http or https");
} httpHosts.add(httpHost);
}
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