Error occurred while reindexing bulk failures search failures – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch fails to reindex documents due to bulk or search failures. This could be due to a variety of reasons such as insufficient memory, incorrect mappings, or network issues. To resolve this, you can increase the heap size to provide more memory, ensure that the mappings are correct, or check the network connectivity. Additionally, you can also try to reindex in smaller batches to reduce the load on the server.

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This guide will help you check for common problems that cause the log ” error occurred while reindexing; bulk failures [{}]; search failures [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, bulk.

Log Context

Log “error occurred while reindexing; bulk failures [{}]; search failures [{}]” classname is SystemIndexMigrator.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            ? Strings.collectionToCommaDelimitedString(bulkByScrollResponse.getBulkFailures())
            : "";
        String searchFailures = (bulkByScrollResponse.getSearchFailures() != null)
            ? Strings.collectionToCommaDelimitedString(bulkByScrollResponse.getSearchFailures())
            : "";
        logger.error("error occurred while reindexing; bulk failures [{}]; search failures [{}]"; bulkFailures; searchFailures);
        return new ElasticsearchException(
            "error occurred while reindexing; bulk failures [{}]; search failures [{}]";
            bulkFailures;
            searchFailures
        );

 

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