Error occurred while reindexing – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Error occurred while reindexing ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, plugin and upgrade.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Error occurred while reindexing” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                                         deleteIndexResponse -> listener.onResponse(bulkByScrollResponse);
                        }; e -> {
                            logger.error("error occurred while reindexing"; e);
                            removeReadOnlyBlockOnReindexFailure(parentAwareClient; index; listener; e);
                        })); listener::onFailure));
            }; listener::onFailure));
        } catch (Exception ex) {
            logger.error("error occurred while upgrading index"; ex);


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