Input/output error when creating snapshot


We have a 3-nodes self-hosted ES 8.5 cluster, and when we make daily snapshots few shards fail every time with the following error:

INTERNAL_SERVER_ERROR: UncategorizedExecutionException[Failed execution]; nested: ExecutionException[ Input/output error]; nested: IOException[Input/output error]

Snapshots are stored on a standalone server, mounted as NFS on all ES nodes.

This is how snapshot repository is configured:

curl -k -u "elastic:password" -XPUT '' -H 'Content-Type: application/json' -d '{
"type": "fs",
"settings": {
"location": "/mnt/backup/snapshots",
"compress": true

Can you point me towards the way to debug these errors please?

Input/output error is a low-level error message reported by the OS itself - see the entry for EIO on this page:

Typically that means your hardware is broken, or something else is fundamentally wrong in your system, but this is nothing to do with Elasticsearch.

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.