Unable to process bulk failure – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch fails to process a bulk request due to reasons like exceeding the index size limit, insufficient memory, or incorrect data format. To resolve this, you can increase the index size limit or allocate more memory to Elasticsearch. Also, ensure the data format is correct and compatible with Elasticsearch. Additionally, consider breaking down large bulk requests into smaller ones to avoid overwhelming the system.

This guide will help you check for common problems that cause the log ” unable to process bulk failure ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bulk, delete, delete-by-query, deletebyquery and plugins.

Log Context

Log “unable to process bulk failure” classname is TransportDeleteByQueryAction.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 }

                logger.trace("scrolling document terminated due to scroll request failure [{}]"; scrollId);
                finishHim(scrollId; hasTimedOut(); failure);
            } catch (Throwable t) {
                logger.error("unable to process bulk failure"; t);
                finishHim(scrollId; false; t);
            }
        }

        void finishHim(final String scrollId; boolean scrollTimedOut; Throwable failure) {




 

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