A bug with _bulk endpoint

Elastic Stack Elasticsearch
1 
[2022-04-06T07:32:33,436][ERROR][logstash.outputs.elasticsearch][main][1ba476d6d04397ba2f8ff005a1e5552e5a5314abde283c5a9a485566374f1026] Encountered an unexpected error submitting a bulk request, will retry {:message=>"Sent 150 documents but Elasticsearch returned 149 responses (likely a bug with _bulk endpoint)", :exception=>RuntimeError, :backtrace=>["/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-11.4.1-java/lib/logstash/plugin_mixins/elasticsearch/common.rb:243:in `submit'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-11.4.1-java/lib/logstash/plugin_mixins/elasticsearch/common.rb:172:in `retrying_submit'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-11.4.1-java/lib/logstash/outputs/elasticsearch.rb:342:in `multi_receive'", "org/logstash/config/ir/compiler/OutputStrategyExt.java:143:in `multi_receive'", "org/logstash/config/ir/compiler/AbstractOutputDelegatorExt.java:121:in `multi_receive'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:299:in `block in start_workers'"]}

facing this issue often when sending from logstash to Elasticsearch.
what could be the issue with _bulk endpoint?

2

What do your Elasticsearch logs show at that time?

3

Which version of Elasticsearch are you using?

4

I am using Elasticsearch:7.11.2.

5

Unfortunately, I am multiple pod running and and no proper logging system. So I am unable to make sense of Elasticsearch logs.

6

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