Unknown url protocol from URL ” + url + ” – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” unknown url protocol from URL ” + url + ” ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repositories.

Log Context

Log “unknown url protocol from URL [” + url + “]”classname  is URLRepository.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

* Makes sure that the url is white listed or if it points to the local file system it matches one on of the root path in path.repo
 private URL checkURL(URL url) {
 String protocol = url.getProtocol();
 if (protocol == null) {
 throw new RepositoryException(getMetadata().name(); "unknown url protocol from URL [" + url + "]");
 for (String supportedProtocol : supportedProtocols) {
 if (supportedProtocol.equals(protocol)) {
 try {
 if (URIPattern.match(urlWhiteList; url.toURI())) {


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