Error while attempting to bulk index documents – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch encounters an issue while trying to index multiple documents at once, typically due to incorrect data format, insufficient memory, or a network issue. To resolve this, you can check the format of your data to ensure it matches the index mapping. If the data is correct, consider increasing the JVM heap size to provide more memory for Elasticsearch. If the error persists, check your network connection and ensure that Elasticsearch is properly configured to handle bulk requests.

This guide will help you check for common problems that cause the log ” Error while attempting to bulk index documents: {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, indexing, bulk, index.

Log Context

Log “Error while attempting to bulk index documents: {}” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                doNextBulk(bulkRequest; ActionListener.wrap(bulkResponse -> {
                    // TODO we should check items in the response and move after accordingly to
                    // resume the failing buckets ?
                    if (bulkResponse.hasFailures()) {
                        logger.warn("Error while attempting to bulk index documents: {}"; bulkResponse.buildFailureMessage());
                    // There is no reason to do a `checkState` here and prevent the indexer from continuing
                    // As we have already indexed the documents; updated the stats; etc.
                    // We do an another `checkState` in `onBulkResponse` which will stop the indexer if necessary


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