ML state index alias could not be updated – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.16-8.2

Briefly, this error occurs when Elasticsearch’s Machine Learning (ML) state index alias cannot be updated due to issues like insufficient permissions, network problems, or a misconfigured Elasticsearch cluster. To resolve this, ensure the user has the correct permissions to update the index alias. Check the network connectivity between the nodes if it’s a distributed environment. Also, verify the cluster’s configuration, especially the settings related to index aliasing. If the issue persists, consider restarting the Elasticsearch service or even the entire cluster, but ensure data safety first.

This guide will help you check for common problems that cause the log ” [{}] ML state index alias could not be updated ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, plugin, alias.

Log Context

Log “[{}] ML state index alias could not be updated” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            e -> {
                logger.error(new ParameterizedMessage("[{}] ML state index alias could not be updated"; jobId); e);
                closeHandler.accept(e; true);

        // Try adding the results doc mapping - this updates to the latest version if an old mapping is present


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