Term version delta – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-1.1

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Briefly, this error occurs when there’s a version conflict in OpenSearch. It happens when you try to update a document but the current version of the document in the index is newer than the one you’re trying to update. To resolve this, you can either retrieve the latest version of the document and apply your changes to it, or use the ‘retry_on_conflict’ parameter to automatically retry the update operation a specified number of times until it succeeds.

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

Log Context

Log “{}; term: {}; version: {}; delta: {}” classname is MasterService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                // new cluster state; notify all listeners
                final DiscoveryNodes.Delta nodesDelta = clusterChangedEvent.nodesDelta();
                if (nodesDelta.hasChanges() && logger.isInfoEnabled()) {
                    String nodesDeltaSummary = nodesDelta.shortSummary();
                    if (nodesDeltaSummary.length() > 0) {
                        logger.info("{}; term: {}; version: {}; delta: {}";
                            summary; newClusterState.term(); newClusterState.version(); nodesDeltaSummary);

                logger.debug("publishing cluster state version [{}]"; newClusterState.version());


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