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

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch Machine Learning (ML) job fails to update the state index alias. This could be due to insufficient permissions, a locked index, or a network issue. To resolve this, ensure the user has the correct permissions to update the index alias. If the index is locked, unlock it. Check the network connectivity between the nodes if it’s a distributed environment. Also, ensure the Elasticsearch cluster is in a healthy state and there’s no ongoing index migration or reindexing that could be causing the issue.

This guide will help you check for common problems that cause the log ” [” + jobId + “] 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: plugin, index, alias.

Log Context

Log “[” + jobId + “] 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(() -> "[" + jobId + "] ML state index alias could not be updated"; 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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