Failed to build index metadata – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.8-8.9

Briefly, this error occurs when Elasticsearch is unable to construct the metadata for an index due to issues like corrupted index, insufficient disk space, or incorrect file permissions. To resolve this, you can try deleting and recreating the index, ensuring there’s enough disk space, or checking and correcting file permissions. If the index is corrupted, you may need to restore it from a backup. Always ensure to have regular backups to prevent data loss.

This guide will help you check for common problems that cause the log ” failed to build index metadata [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: metadata, index, cluster.

Log Context

Log “failed to build index metadata [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            } catch (Exception e) {
      "failed to build index metadata [{}]"; request.index());
                throw e;

                silent ? Level.DEBUG : Level.INFO;


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