Failed to clean up old index blobs – 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 analyzes 2 JSON files to detect many errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them. Take a self-guided product tour to see for yourself (no registration required).

This guide will help you check for common problems that cause the log ” Failed to clean up old index blobs ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, index, repositories and repository-azure.

Log Context

Log “Failed to clean up old index blobs {}” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                 .mapToObj(gen -> INDEX_FILE_PREFIX + gen)
                            try {
                            } catch (IOException e) {
                                logger.warn(() -> new ParameterizedMessage("Failed to clean up old index blobs {}"; oldIndexN); e);
        }; listener::onFailure);


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