Abdicating to with term – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when a node in an OpenSearch cluster steps down from being the master node, abdicating its role to another node. This can happen due to network issues, heavy load, or configuration problems causing the master to not respond in time. To resolve this, ensure your network is stable, balance the load across nodes, and check your cluster’s configuration. Also, consider increasing the ‘master service timeout’ settings if the master is under heavy load.

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This guide will help you check for common problems that cause the log ” abdicating to {} with term {} ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster.

Log Context

Log “abdicating to {} with term {}” classname is Coordinator.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        assert Thread.holdsLock(mutex);
        assert mode == Mode.LEADER : "expected to be leader on abdication but was " + mode;
        assert newClusterManager.isClusterManagerNode() : "should only abdicate to cluster-manager-eligible node but was "
            + newClusterManager;
        final StartJoinRequest startJoinRequest = new StartJoinRequest(newClusterManager; Math.max(getCurrentTerm(); maxTermSeen) + 1);
        logger.info("abdicating to {} with term {}"; newClusterManager; startJoinRequest.getTerm());
        getLastAcceptedState().nodes().clusterManagersFirstStream().forEach(node -> {
            if (isZen1Node(node) == false) {
                joinHelper.sendStartJoinRequest(startJoinRequest; node);
            }
        });

 

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