Failed to execute bulk: – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

Briefly, this error occurs when Elasticsearch is unable to execute a bulk request that contains multiple indexing or deletion operations. The failure to execute a bulk operation can result in data loss or indexing errors. The cause of this error can be due to incorrect data formatting, invalid index/mapping configuration, or lack of sufficient resources (like memory or disk space) in Elasticsearch. To resolve this error, you can ensure that the data is correctly formatted, the index and mapping configuration is correct, and Elasticsearch has sufficient resources to execute the bulk operation.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Failed to execute bulk: ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices.

Log Context

Log “failed to execute bulk: [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    public void onFailure(Throwable e) {
                        if (logger.isTraceEnabled()) {
                            logger.trace("failed to execute bulk"; e);
                        } else {
                            logger.warn("failed to execute bulk: [{}]"; e.getMessage());
            } catch (Exception e) {
                logger.warn("failed to process bulk"; e);


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