Failed to delete 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 certain indices due to reasons like insufficient permissions, locked indices, or ongoing operations on the indices. To resolve this, you can try the following: 1) Ensure the user has the necessary permissions to delete indices. 2) Unlock the indices if they are locked. 3) Wait for any ongoing operations on the indices to complete before attempting to delete them. 4) Check for any underlying system or network issues that might be preventing the deletion.

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

Log Context

Log “failed to delete 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 delete indices"; e);


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