Deleting weighted routing metadata from the cluster state – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.4-2.9

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Briefly, this error occurs when there’s an attempt to delete weighted routing metadata from the cluster state in OpenSearch. This could be due to a misconfiguration or an issue with the cluster state. To resolve this, you can try the following: 1) Check and correct any misconfigurations in your OpenSearch settings. 2) Try to restore the cluster state from a backup if available. 3) If the issue persists, consider restarting the OpenSearch cluster, but be aware that this should be a last resort as it can cause downtime.

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This guide will help you check for common problems that cause the log ” Deleting weighted routing metadata from the cluster state ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: routing, cluster, metadata.

Log Context

Log “Deleting weighted routing metadata from the cluster state” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        final long requestVersion = request.getVersion();
        final String awarenessAttribute = request.getAwarenessAttribute();
        clusterService.submitStateUpdateTask("delete_weighted_routing"; new ClusterStateUpdateTask(Priority.URGENT) {
            public ClusterState execute(ClusterState currentState) {
      "Deleting weighted routing metadata from the cluster state");
                Metadata metadata = currentState.metadata();
                Metadata.Builder mdBuilder = Metadata.builder(currentState.metadata());
                WeightedRoutingMetadata weightedRoutingMetadata = metadata.custom(WeightedRoutingMetadata.TYPE);
                ensureNoVersionConflict(requestVersion; weightedRoutingMetadata);


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