Failed to clean up old index blobs – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.6-7.13

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Briefly, this error occurs when Elasticsearch tries to delete old index blobs but fails due to issues like insufficient permissions, disk space, or network connectivity. To resolve this, you can check and adjust the permissions of the Elasticsearch directory, ensure there’s enough disk space, or verify the network connectivity. Also, check the Elasticsearch logs for more specific error details.

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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: repositories, blobstore, index.

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 {
                                deleteFromContainer(blobContainer(); oldIndexN);
                            } catch (IOException e) {
                                logger.warn(() -> new ParameterizedMessage("Failed to clean up old index blobs {}"; oldIndexN); e);
                            return newRepositoryData;


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