Failed to execute progress listener on list shards – 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 execute a progress listener while listing shards, possibly due to network issues, node failures, or resource constraints. To resolve this, you can try the following: 1) Check the health of your nodes and network, and fix any identified issues. 2) Increase the resources allocated to OpenSearch if they’re insufficient. 3) Review your shard allocation and distribution, and adjust if necessary. 4) Check your OpenSearch logs for more detailed error information, which can guide further troubleshooting.

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This guide will help you check for common problems that cause the log ” Failed to execute progress listener on list shards ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: shards, search.

Log Context

Log “Failed to execute progress listener on list shards” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

    final void notifyListShards(List shards; List skippedShards; Clusters clusters; boolean fetchPhase) {
        this.shards = shards;
        try {
            onListShards(shards; skippedShards; clusters; fetchPhase);
        } catch (Exception e) {
            logger.warn(() -> new ParameterizedMessage("Failed to execute progress listener on list shards"); e);

    final void notifyQueryResult(int shardIndex) {
        try {


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