Failed to delete data blob during finalization – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.1

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Briefly, this error occurs when Elasticsearch fails to delete a data blob during the finalization process. This could be due to insufficient permissions, a full disk, or a network connectivity issue. To resolve this, you can check and adjust the permissions of the Elasticsearch directory, ensure there is enough disk space, or troubleshoot network connectivity issues. Additionally, you can also check the Elasticsearch logs for more detailed information about the error.

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This guide will help you check for common problems that cause the log ” [{}][{}] failed to delete data blob [{}] during finalization ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repositories, blobstore, delete.

Log Context

Log “[{}][{}] failed to delete data blob [{}] during finalization” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                for (final String blobName : blobs.keySet()) {
                    if (blobName.startsWith(DATA_BLOB_PREFIX) && (updatedSnapshots.findNameFile(canonicalName(blobName)) == null)) {
                        try {
                        } catch (IOException e) {
                            logger.warn(() -> new ParameterizedMessage("[{}][{}] failed to delete data blob [{}] during finalization";
                                snapshotId; shardId; blobName); e);
            } catch (IOException e) {


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