Failed to update system index metadata – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch fails to update the metadata of a system index. This could be due to insufficient permissions, a network issue, or a disk space problem. To resolve this, you can check and adjust the user permissions, ensure the network connectivity is stable, and verify there’s enough disk space. Additionally, check the OpenSearch logs for more detailed error information. If the issue persists, consider restarting the OpenSearch service or, as a last resort, reindexing the system index.

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This guide will help you check for common problems that cause the log ” failed to update system index metadata ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster, index, metadata.

Log Context

Log “failed to update system index metadata” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :


        public void onFailure(String source; Exception e) {
            updateTaskPending = false;
            logger.error("failed to update system index metadata"; e);

        public void clusterStateProcessed(String source; ClusterState oldState; ClusterState newState) {
            lastIndexMetadataMap = newState.metadata().indices();


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