Failed to process shard failure to potentially send back shard failure on corruption – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch encounters a problem while processing a shard, possibly due to data corruption. This could be due to hardware issues, network problems, or software bugs. To resolve this issue, you can try the following: 1) Check the health of your hardware and network, 2) Verify the integrity of your data, 3) Update or patch your OpenSearch software to the latest version, 4) If possible, restore the corrupted shard from a backup, 5) If the problem persists, consider reindexing your data.

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This guide will help you check for common problems that cause the log ” failed to process shard failure to (potentially) send back shard failure on corruption ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: search, shard.

Log Context

Log “failed to process shard failure to (potentially) send back shard failure on corruption” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            if (Lucene.isCorruptionException(exc)) {
                context.indexShard().failShard("search execution corruption failure"; exc);
        } catch (Exception inner) {
            logger.warn("failed to process shard failure to (potentially) send back shard failure on corruption"; inner);

    private void parseSource(DefaultSearchContext context; SearchSourceBuilder source; boolean includeAggregations) {
        // nothing to parse...


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