Azure proxy host is unknown – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to recognize the Azure proxy host. This could be due to incorrect configuration settings or network issues. To resolve this, you can verify your Azure proxy host settings in the Elasticsearch configuration file. Ensure that the host is correctly specified and accessible. Also, check your network connectivity to the Azure proxy host. If the problem persists, you may need to consult with your network administrator or Azure support for further assistance.

This guide will help you check for common problems that cause the log ” Azure proxy host is unknown. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: azure, repository-azure, repositories.

Log Context

Log “Azure proxy host is unknown.” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 proxy = null;
 } else {
 try {
 proxy = new Proxy(proxyType; new InetSocketAddress(InetAddress.getByName(proxyHost); proxyPort));
 } catch (final UnknownHostException e) {
 throw new SettingsException("Azure proxy host is unknown."; e);
 }  public String getEndpointSuffix() {


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