Unknown url protocol from URL ” + url + ” – Elasticsearch Error How To Solve Related Issues

Unknown url protocol from URL ” + url + ” – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many errors 


This guide will help you check for common problems that cause the log “unknown url protocol from URL ” + url + “” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: repositories.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

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())) {

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 java.net.MalformedURLException: no protocol on URL based on a string modified with URLEncoder -views 227,740 ,score 30

Malformed URL no protocol error -views   37,821,score 1

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