Error creating ML annotations index or aliases – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch Machine Learning (ML) fails to create an annotations index or aliases due to insufficient permissions, incorrect configurations, or system resource limitations. To resolve this, ensure the user has the necessary permissions to create indices. Check the Elasticsearch configuration for any errors and correct them. Also, verify that the system has enough resources (CPU, memory, disk space) to handle the operation. If the issue persists, consider restarting the Elasticsearch service.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Error creating ML annotations index or aliases ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, index, aliases.

Log Context

Log “Error creating ML annotations index or aliases” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                ActionListener.wrap(r -> isIndexCreationInProgress.set(false); e -> {
                    if (e.getMessage().equals(previousException)) {
                        logger.debug("Error creating ML annotations index or aliases"; e);
                    } else {
                        previousException = e.getMessage();
                        logger.error("Error creating ML annotations index or aliases"; e);


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?

Get expert answers on Elasticsearch/OpenSearch