Spark write to es thrown 'FORBIDDEN/12/index read-only'

Hi team, i meet some problem, when i write data from spark streaming to elasticsearch, there throw [FORBIDDEN/12/index read-only / allow delete (api)], i though may caused by low disk space, so i chekced node stat:

it seems ok... now i can't figure it out, what kind of logical trigger the write protection?

Which version of Elasticsearch are you using? What is the full output of the cluster stats API?

version: 6.5.3

node stat :

cluster stat:

because payload too large

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