I have a cluster in version 6.2.4, with 300 data nodes.
I start getting an exception says that my index is in read only.
I get this when I try to index documents, but only after a while, at first it works well.
I change it manualy through the put setting API, but it still gets this error.
It also takes place at the same time on multiple indices.
Exception - "blocked by:[forbidden/12/index read-only/allow delete (api)]"
What could be the reason for this?