Found stale root level blobs . Cleaning them up – 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 can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Found stale root level blobs . Cleaning them up ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, repositories, repository-azure and rest-high-level.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “[{}] Found stale root level blobs {}. Cleaning them up” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

     private List cleanupStaleRootFiles(List blobsToDelete) {
        if (blobsToDelete.isEmpty()) {
            return blobsToDelete;
        try {
  "[{}] Found stale root level blobs {}. Cleaning them up";; blobsToDelete);
            return blobsToDelete;
        } catch (IOException e) {
            logger.warn(() -> new ParameterizedMessage(
                "[{}] The following blobs are no longer part of any snapshot [{}] but failed to remove them";


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