SLM retention snapshot cleanup task complete – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.7-8.9

Briefly, this error occurs when Elasticsearch’s Snapshot Lifecycle Management (SLM) completes a snapshot cleanup task. It’s not an error but an informational message indicating that the cleanup task has successfully finished. If you see this message frequently and it’s causing concern, you can adjust the logging level to reduce the verbosity. Alternatively, you can modify the SLM policy to take snapshots less frequently or retain fewer snapshots, reducing the frequency of cleanup tasks.

This guide will help you check for common problems that cause the log ” SLM retention snapshot cleanup task complete ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, task, snapshot.

Log Context

Log “SLM retention snapshot cleanup task complete” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


                    // Finally; delete the snapshots that need to be deleted
                    deleteSnapshots(snapshotsToBeDeleted; slmStats; ActionListener.running(() -> {
              "SLM retention snapshot cleanup task complete");

                public void onFailure(Exception e) {


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