Failure creating ml stats index for storing model stats – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.8-8.9

Briefly, this error occurs when Elasticsearch Machine Learning (ML) fails to create an index for storing model statistics. This could be due to insufficient permissions, lack of storage space, or a configuration issue. To resolve this, ensure the user has the correct permissions to create an index. Check if there’s enough disk space available and if the Elasticsearch cluster is properly configured. Also, verify that the ML feature is enabled and properly set up. If the problem persists, consider restarting the Elasticsearch cluster.

This guide will help you check for common problems that cause the log ” failure creating ml stats index for storing model stats ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, index.

Log Context

Log “failure creating ml stats index for storing model stats” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            } catch (Exception e) {
                // This exception occurs if; for some reason; the `createStatsIndexAndAliasIfNecessary` fails due to
                // a concrete index of the alias name already existing. This error is recoverable eventually; but
                // should NOT cause us to lose statistics.
                if ((e instanceof InvalidAliasNameException) == false) {
                    logger.error("failure creating ml stats index for storing model stats"; e);


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