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

Opster Team

March-22, 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 ” 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”classname  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) {


See how you can use AutoOps to resolve issues

How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Analyze your cluster & get personalized recommendations

Skip to content