Failed to list dangling indices – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to list indices that are not associated with any cluster state due to issues like insufficient permissions, disk space, or corrupted index files. To resolve this, you can try the following: 1) Check and adjust the user permissions for the Elasticsearch directory. 2) Free up or increase the disk space. 3) Repair or delete the corrupted index files. Always ensure to back up your data before making any changes.

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

Log Context

Log “failed to list dangling indices” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


            return danglingIndices;
        } catch (IOException e) {
            logger.warn("failed to list dangling indices"; e);
            return emptyMap();



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