Hi all,
We encountered a transient issue with the [WARN] said:
Could not index event to Elasticsearch
From the log, the response is like
:response => {"create"=>{"_index"=>"zzzzzzzzzz"},
"_type"=>"_doc",
"_id"=>"xxxxxxxxx",
"status"=>"400",
"error"=>{"type"=>"illegal_argument_exception",
"reason"=>"Unknown opType: [-1]"}
This issue lasted 10+ seconds with 1000+ hits and disappeared by itself without any intervention.
I wonder what could be the possible cause? Another weird thing is I did not see any exception IllegalArgumentException
from master node log.
Also, checked the index zzzzzzzzzz
_stats, the failed index number is 0, but I think it should not.
Thanks!