Could not load XSD schema file – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.7-8.9

Briefly, this error occurs when Elasticsearch is unable to locate or access the XSD schema file. This could be due to incorrect file path, insufficient permissions, or the file being corrupt or missing. To resolve this issue, you can verify the file path and ensure it’s correct, check the file permissions to ensure Elasticsearch has access, or replace the file if it’s corrupt or missing. If the file is being accessed over a network, ensure the network connection is stable.

This guide will help you check for common problems that cause the log ” Could not load XSD schema file ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Could not load XSD schema file” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 private static final ThreadLocal THREAD_LOCAL_DOCUMENT_BUILDER = ThreadLocal.withInitial(() -> {
 try {
 return SamlFactory.getHardenedBuilder(XSD_FILES);
 } catch (Exception e) {
 throw new ElasticsearchSecurityException("Could not load XSD schema file"; e);
 });  public SamlAuthnRequestValidator(SamlFactory samlFactory; SamlIdentityProvider idp) {