# Duplicated data in kafka using logstash

**URL:** <https://discuss.elastic.co/t/duplicated-data-in-kafka-using-logstash/143677>\
**Category:** Logstash\
**Created:** [August 9, 2018, 10:49am UTC](https://discuss.elastic.co/t/duplicated-data-in-kafka-using-logstash/143677 "2018-08-09T10:49:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jogoinar10](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jogoinar10/32/20068_2.png) [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)\
**Post date:** [August 9, 2018, 10:49am UTC](https://discuss.elastic.co/t/duplicated-data-in-kafka-using-logstash/143677/1 "2018-08-09T10:49:08Z")

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I am using logstash pipeline data from elasticsearch to kafka.  
I have an index(asd\_logstash-2018.07.15) with around 1000 docs, but upon checking in kafka it went around 22k messages and continuously increasing.

I came across this blog [https://www.elastic.co/blog/logstash-lessons-handling-duplicates](https://www.elastic.co/blog/logstash-lessons-handling-duplicates), but I don't know how to pass ID in kafka.

Here is my config.

```
input{
 elasticsearch{
  hosts => "192.168.0.254:9200"
  index => "asd_logstash-2018.07.15"
  size => 1000
  scroll => "5m"
  docinfo => true 
 }
}

output{
 kafka{
  codec => json
  topic_id => "sampletest"
  bootstrap_servers => "192.168.0.64:9092"
 }
}
```

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<div class="post-metadata">

**Author:** ![jogoinar10](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jogoinar10/32/20068_2.png) [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)\
**Post date:** [August 10, 2018, 6:35am UTC](https://discuss.elastic.co/t/duplicated-data-in-kafka-using-logstash/143677/2 "2018-08-10T06:35:57Z")

</div>

I tried to use fingerprint filter plugin from logstash but the output if kafka still duplicates.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 7, 2018, 6:36am UTC](https://discuss.elastic.co/t/duplicated-data-in-kafka-using-logstash/143677/3 "2018-09-07T06:36:01Z")

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