We are using elasticsearch with version 7.6.2 with 9 data nodes and 3 masters.
We are getting an error on scroll requests as defined below;
> Elasticsearch exception [type=exception, reason=Trying to create too many scroll contexts. Must be less than or equal to:  on specific shards.
When I recreate index it works for a while.First of all, it fails always shard number 4, then reindex it fixed but now it fails on index number 0.