Deleting dangling index – 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 can resolve issues that cause many errors.

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

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 “[{}] deleting dangling index” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 DanglingIndex remove = danglingIndices.remove(metaData.index());
                // no longer there...
                if (remove == null) {
                logger.warn("[{}] deleting dangling index"; metaData.index());
                try {
                    indicesService.deleteIndexStore("deleting dangling index"; metaData; clusterService.state());
                } catch (Exception ex) {
                    logger.debug("failed to delete dangling index"; ex);


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