Too many cached tokens with illegal_state_exception error

Elastic Stack Elasticsearch
1

While doing bulk request to bulk API I got response with errors:

Type: (string) (len=23) "illegal_state_exception",
Reason: (string) (len=30) "Too many cached tokens (> 100)"

I tried to Google this Too many cached tokens (> 100) error, but found nothing.
Please help me to understand the problem.

ES version: 7.4.1

2

What do your Elasticsearch logs show?
What is the full error from Elasticsearch?

3

There is a bug - https://github.com/elastic/elasticsearch/issues/61491