Failed to clean indices – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to delete or clean up old indices due to insufficient permissions, disk space issues, or a misconfigured setting. To resolve this issue, you can try the following: 1) Check and adjust the user permissions to ensure Elasticsearch has the necessary rights to delete indices. 2) Free up disk space if it’s running low. 3) Review and correct your Elasticsearch settings, particularly those related to index management and deletion. 4) Restart the Elasticsearch service, as sometimes a simple restart can resolve the issue.

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

Log Context

Log “failed to clean indices” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


        public void onFailure(Exception e) {
            logger.error("failed to clean indices"; e);

         * Cancel/stop the cleaning service.


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