# \[ERROR\]\[logstash.outputs.elasticsearch\] An unknown error occurred sending a bulk request to Elasticsearch
**URL:** https://discuss.elastic.co/t/error-logstash-outputs-elasticsearch-an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch/101107
**Category:** Logstash
**Created:** [September 20, 2017, 6:32am UTC](https://discuss.elastic.co/t/error-logstash-outputs-elasticsearch-an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch/101107 "2017-09-20T06:32:59Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Nikhil\_Jaiswal](https://discuss.elastic.co/u/Nikhil_Jaiswal)
#### Post date: [September 20, 2017, 6:32am UTC](https://discuss.elastic.co/t/error-logstash-outputs-elasticsearch-an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch/101107/1 "2017-09-20T06:32:59Z")
Hi,
I am getting this error while running logstash, i am not able to rectify the issue from this log, after running configtest , i am getting **Configuration Ok** message in screen.
[2017-09-20T11:33:29,335][ERROR][logstash.outputs.elasticsearch] An unknown error occurred sending a bulk request to Ela
sticsearch. We will retry indefinitely {:error\_message=\>"Unrecognized token 'The': was expecting ('true', 'false' or 'nu
ll')\n at [Source: [B@2268bb96; line: 1, column: 5]", :error\_class=\>"LogStash::Json::ParserError", :backtrace=\>["C:/SIEM
/logstash-5.5.1/logstash-core/lib/logstash/json.rb:41:in `jruby_load'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logsta sh/json.rb:38:in`jruby\_load'", "C:/SIEM/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.3.7
-java/lib/logstash/outputs/elasticsearch/http\_client.rb:143:in `bulk_send'", "C:/SIEM/logstash-5.5.1/vendor/bundle/jruby /1.9/gems/logstash-output-elasticsearch-7.3.7-java/lib/logstash/outputs/elasticsearch/http_client.rb:123:in`bulk'", "C:
/SIEM/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.3.7-java/lib/logstash/outputs/elastics
earch/common.rb:225:in `safe_bulk'", "C:/SIEM/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch- 7.3.7-java/lib/logstash/outputs/elasticsearch/common.rb:123:in`submit'", "C:/SIEM/logstash-5.5.1/vendor/bundle/jruby/1.
9/gems/logstash-output-elasticsearch-7.3.7-java/lib/logstash/outputs/elasticsearch/common.rb:91:in `retrying_submit'", " C:/SIEM/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.3.7-java/lib/logstash/outputs/elasti csearch/common.rb:42:in`multi\_receive'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logstash/output\_delegator\_strategies
/shared.rb:13:in `multi_receive'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logstash/output_delegator.rb:47:in`multi\_r
eceive'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logstash/pipeline.rb:420:in `output_batch'", "org/jruby/RubyHash.jav a:1342:in`each'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logstash/pipeline.rb:419:in `output_batch'", "C:/SIEM/logst ash-5.5.1/logstash-core/lib/logstash/pipeline.rb:365:in`worker\_loop'", "C:/SIEM/logstash-5.5.1/logstash-core/lib/logsta
sh/pipeline.rb:330:in `start\_workers'"]}
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [September 20, 2017, 9:56am UTC](https://discuss.elastic.co/t/error-logstash-outputs-elasticsearch-an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch/101107/2 "2017-09-20T09:56:06Z")
Check your Elasticsearch logs for something as the same time, it will likely mention boolean and mapping.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 18, 2017, 9:56am UTC](https://discuss.elastic.co/t/error-logstash-outputs-elasticsearch-an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch/101107/3 "2017-10-18T09:56:09Z")
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