Releasing snapshot caused exception – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch encounters an issue while trying to release a snapshot. This could be due to a variety of reasons such as insufficient permissions, network connectivity issues, or problems with the snapshot repository. To resolve this issue, you can check the permissions of the snapshot repository, ensure that the network connection is stable, and verify the integrity of the snapshot. If the problem persists, consider creating a new snapshot or restoring from a different snapshot.

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This guide will help you check for common problems that cause the log ” releasing snapshot caused exception ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: recovery, snapshot, indices.

Log Context

Log “releasing snapshot caused exception” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

    ) {
        sendFileStep.whenComplete(r -> IOUtils.close(wrappedSafeCommit; releaseStore); e -> {
            try {
                IOUtils.close(wrappedSafeCommit; releaseStore);
            } catch (final IOException ex) {
                logger.warn("releasing snapshot caused exception"; ex);

    protected boolean isTargetSameHistory() {


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