Cannot close blob store – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch fails to close a blob store, which is a data storage used for storing large binary objects. This could be due to a network issue, a disk space issue, or a problem with the blob store itself. To resolve this issue, you can try the following: 1) Check and ensure there is enough disk space. 2) Verify the network connectivity between Elasticsearch and the blob store. 3) Check the blob store for any issues or errors. 4) Restart the Elasticsearch service.

This guide will help you check for common problems that cause the log ” cannot close blob store ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, repositories.

Log Context

Log “cannot close blob store” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        if (store != null) {
            try {
            } catch (Exception t) {
                logger.warn("cannot close blob store"; t);

    // listeners to invoke when a restore completes and there are no more restores running


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