Completed upgrade mode request – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8-8.9

Briefly, this error occurs when Elasticsearch has finished processing a request to upgrade the system. This is not an error message, but an informational message indicating that the upgrade process has been completed successfully. If you’re seeing this message frequently or unexpectedly, it might be due to automated scripts or processes triggering the upgrade. To resolve this, you should check your system’s scheduled tasks or scripts that might be initiating the upgrade process. Also, ensure that the upgrade is necessary and compatible with your current system to avoid potential issues.

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

Log Context

Log “Completed upgrade mode request” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
            "Starting to set [upgrade_mode] to [" + request.isEnabled() + "] from [" + MlMetadata.getMlMetadata(state).isUpgradeMode() + "]"

        ActionListener wrappedListener = ActionListener.wrap(r -> {
  "Completed upgrade mode request");
        }; e -> {
  "Completed upgrade mode request but with failure"; e);