Failed to restore snapshot – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

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Briefly, this error occurs when Elasticsearch is unable to restore a snapshot due to reasons like insufficient disk space, incompatible snapshot version, or corrupted snapshot files. To resolve this, ensure you have enough disk space and the snapshot version is compatible with your Elasticsearch version. If the snapshot files are corrupted, try restoring from a different snapshot. Also, check the Elasticsearch logs for more specific error details to help identify the problem.

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

Log Context

Log “[{}] failed to restore snapshot” classname is RestoreService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            }
        }

        @Override
        public void onFailure(Exception e) {
            logger.warn(() -> new ParameterizedMessage("[{}] failed to restore snapshot"; snapshot); e);
            listener.onFailure(e);
        }

        @Override
        public void clusterStateProcessed(ClusterState oldState; ClusterState newState) {

 

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