Failed to build profile index mappings – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.1-8.9

Briefly, this error occurs when Elasticsearch is unable to construct the index mappings due to incorrect syntax, unsupported field types, or incorrect field parameters. To resolve this issue, you can check the mapping syntax for errors, ensure that you’re using supported field types, and verify that field parameters are correctly defined. Additionally, ensure that the Elasticsearch version supports the features used in your mappings. If the error persists, consider simplifying your mappings or breaking them down into smaller parts to isolate the issue.

This guide will help you check for common problems that cause the log ” Failed to build profile index mappings ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, index.

Log Context

Log “Failed to build profile index mappings” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            return builder;
        } catch (IOException e) {
            logger.fatal("Failed to build profile index mappings"; e);
            throw new UncheckedIOException("Failed to build profile index mappings"; e);

    private static void defineRealmDomain(XContentBuilder builder; String fieldName) throws IOException {


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?