Starting awareness attribute decommissioning – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.4-2.9

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Briefly, this error occurs when OpenSearch is initiating the decommissioning process of a node. This is part of the cluster’s awareness attribute, which helps in maintaining the cluster’s health and stability. To resolve this issue, you can either wait for the decommissioning process to complete if it’s intentional, or if it’s not, check your cluster settings and adjust the awareness attributes. Additionally, ensure that your nodes are properly configured and communicating effectively with each other to prevent unintentional decommissioning.

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This guide will help you check for common problems that cause the log ” starting awareness attribute [{}] decommissioning ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster, admin.

Log Context

Log “starting awareness attribute [{}] decommissioning” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :


    protected void clusterManagerOperation(DecommissionRequest request; ClusterState state; ActionListener listener)
        throws Exception {"starting awareness attribute [{}] decommissioning"; request.getDecommissionAttribute().toString());
        decommissionService.startDecommissionAction(request; listener);


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