Failed to flush export bulks – How to solve this Elasticsearch error

Failed to flush export bulks – How to solve this Elasticsearch error

Opster Team

February-21, Version: 1.7-8.0

To understand why Elasticsearch failed to flush export bulks and resolve the issue, we recommend you run the Elasticsearch Error Check-Up. The Check-Up will analyze your cluster and provide you with actionable recommendations to resolve and prevent this issue and many others.

This guide will help you check for common problems that cause the log “failed to flush export bulks” to appear. It’s important to understand the related issues related, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: flush and plugin.

Log Context

Log”failed to flush export bulks”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

final BiConsumer> bulkBiConsumer = (exportBulk; iteratingListener) -> {
  // for every export bulk we flush and pass back the response; which should always be
  // null. When we have an exception; we wrap the first and then add suppressed exceptions
  exportBulk.flush(ActionListener.wrap(iteratingListener::onResponse; e -> {
  if (exceptionRef.get() == null) {
  exceptionRef.set(new ExportException("failed to flush export bulks"; e));
  } else if (e instanceof ExportException) {
  exceptionRef.get().addExportException((ExportException) e);
  } else {


Run the Check-Up to get a customized report like this:

Analyze your cluster