# An unknown error occurred sending a bulk request to Elasticsearch. We will retry indefinitely {:error\_message=\>"\\"\\\\xC4\\" from ASCII-8BIT to UTF-8", :error\_class=\>"LogStash::Json::GeneratorError"
**URL:** https://discuss.elastic.co/t/an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch-we-will-retry-indefinitely-error-message-xc4-from-ascii-8bit-to-utf-8-error-class-logstash-generatorerror/155826
**Category:** Logstash
**Created:** [November 8, 2018, 6:51am UTC](https://discuss.elastic.co/t/an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch-we-will-retry-indefinitely-error-message-xc4-from-ascii-8bit-to-utf-8-error-class-logstash-generatorerror/155826 "2018-11-08T06:51:54Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@pank](https://discuss.elastic.co/u/pank)
#### Post date: [November 8, 2018, 6:51am UTC](https://discuss.elastic.co/t/an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch-we-will-retry-indefinitely-error-message-xc4-from-ascii-8bit-to-utf-8-error-class-logstash-generatorerror/155826/1 "2018-11-08T06:51:54Z")
I am using logstash 6.4.0 and elasticsearch 6.4.0. I have these config files in test.config and test1.config. I have created pipeline id in files pipelines.yml . I have simple two config file test
```
input {
jdbc {
jdbc_driver_library => "/opt/abacus/logstash/logstash-6.4.0/lib/ojdbc7-12.1.0.2.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
jdbc_connection_string => "jdbc:oracle:thin:@ABC.a.b.c.com:9999/ABC"
jdbc_user => "user"
jdbc_password => "root"
statement => "SELECT * FROM DB.user_detail"
}
}
output {
elasticsearch {
hosts => ["localhost:9200"]
index => "user_detail"
document_id => "%{id}"
}
}
```
test1
```
input {
jdbc {
jdbc_driver_library => "/opt/abacus/logstash/logstash-6.4.0/lib/ojdbc7-12.1.0.2.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
jdbc_connection_string => "jdbc:oracle:thin:@ABC.a.b.ccom:9999/ABC"
jdbc_user => "user"
jdbc_password => "root"
statement => "SELECT * FROM DB.library_detail"
}
}
output {
elasticsearch {
hosts => ["localhost:9200"]
index => "library_detail"
document_id => "%{id}"
}
}
```
`[2018-11-08T06:45:01,558][ERROR][logstash.outputs.elasticsearch] An unknown error occurred sending a bulk request to Elasticsearch. We will retry indefinitely {:error_message=>"\"\\xC4\" from ASCII-8BIT to UTF-8", :error_class=>"LogStash::Json::GeneratorError", :backtrace=>["/opt/abacus/logstash/logstash-6.4.0/logstash-core/lib/logstash/json.rb:27:in`jruby\_dump'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/http\_client.rb:119:in `block in bulk'", "org/jruby/RubyArray.java:2486:in`map'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/http\_client.rb:119:in `block in bulk'", "org/jruby/RubyArray.java:1734:in`each'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/http\_client.rb:117:in `bulk'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/common.rb:275:in`safe\_bulk'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/common.rb:180:in `submit'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/common.rb:148:in`retrying\_submit'", "/opt/abacus/logstash/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstash/outputs/elasticsearch/common.rb:38:in `multi_receive'", "org/logstash/config/ir/compiler/OutputStrategyExt.java:114:in`multi\_receive'", "org/logstash/config/ir/compiler/AbstractOutputDelegatorExt.java:97:in `multi_receive'", "/opt/abacus/logstash/logstash-6.4.0/logstash-core/lib/logstash/pipeline.rb:372:in`block in output\_batch'", "org/jruby/RubyHash.java:1343:in `each'", "/opt/abacus/logstash/logstash-6.4.0/logstash-core/lib/logstash/pipeline.rb:371:in`output\_batch'", "/opt/abacus/logstash/logstash-6.4.0/logstash-core/lib/logstash/pipeline.rb:323:in `worker_loop'", "/opt/abacus/logstash/logstash-6.4.0/logstash-core/lib/logstash/pipeline.rb:285:in`block in start\_workers'"]}`
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 6, 2018, 6:52am UTC](https://discuss.elastic.co/t/an-unknown-error-occurred-sending-a-bulk-request-to-elasticsearch-we-will-retry-indefinitely-error-message-xc4-from-ascii-8bit-to-utf-8-error-class-logstash-generatorerror/155826/2 "2018-12-06T06:52:10Z")
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