Snapshot api: Failed to derive xcontent from (offset=0, length=0)


unfortunately during the easter holidays the backup space of our ES cluster
was running out of diskspace.

We added some diskspace to the backup location, but we are getting this
error when ES is trying to access the Repo:

curl -XGET 'localhost:9200/_snapshot/backup/_all?pretty'


"error" :
nested: ElasticsearchParseException[Failed to derive xcontent from
(offset=0, length=0): []]; ",

"status" : 400

ES is also not able to create new snapshots in this repo. There is noting
about this topic in the logfiles (not on the master and not on the nodes).
The backup space is mounted and read/write able on all nodes.

Can anybody tell me how i can get the repo back working or how i can debug
this problem?

Best regards,


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I have already met this problem. I wonder the answers as well.