%s failed upgrading snapshot %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

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Briefly, this error occurs when Elasticsearch encounters an issue while trying to upgrade a snapshot. This could be due to a variety of reasons such as insufficient disk space, network issues, or incompatible snapshot versions. To resolve this issue, you can try the following: 1) Ensure there is enough disk space available. 2) Check the network connectivity between the nodes. 3) Verify the snapshot version compatibility with the current Elasticsearch version. 4) Check the Elasticsearch logs for more detailed error information.

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This guide will help you check for common problems that cause the log ” [%s] failed upgrading snapshot [%s] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, snapshot.

Log Context

Log “[%s] failed upgrading snapshot [%s]” classname is SnapshotUpgradeTaskExecutor.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                if (e == null) {
                    auditor.info(jobId; "Finished upgrading snapshot [" + snapshotId + "]");
                    logger.info("[{}] [{}] finished upgrading snapshot"; jobId; snapshotId);
                } else {
                    logger.warn(() -> format("[%s] failed upgrading snapshot [%s]"; jobId; snapshotId); e);
                        "failed upgrading snapshot [" + snapshotId + "] with exception " + ExceptionsHelper.unwrapCause(e).getMessage()


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