# Logstash-input-kafka modify non-ascii

**URL:** <https://discuss.elastic.co/t/logstash-input-kafka-modify-non-ascii/87063>\
**Category:** Logstash\
**Created:** [May 25, 2017, 2:38am UTC](https://discuss.elastic.co/t/logstash-input-kafka-modify-non-ascii/87063 "2017-05-25T02:38:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![aimerlee860](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@aimerlee860](https://discuss.elastic.co/u/aimerlee860)\
**Post date:** [May 25, 2017, 2:38am UTC](https://discuss.elastic.co/t/logstash-input-kafka-modify-non-ascii/87063/1 "2017-05-25T02:38:04Z")

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Hi,

I meet a problem when using logstash-input-kafka plugin recently.  
I write a serialized protobuf message to kafka, and then use logstash-input-kafka plugin to consume the messages in logstash, but I find that some none-ascii chars have been modified like: 0x0aeb =\> 0x0aef 0xbfdb, which makes parsing protobuf message from string failed, here is the version details:

kafka: 2.10-0.10.0.0  
logstash: 5.2.2  
logstash-plugin-kafka: 5.1.6

Input part of logstash configuration:

input {  
kafka {  
bootstrap\_servers =\> “host:9092"  
topics =\> ’top\_name'  
codec =\> protobuf  
{  
class\_name =\> “Module::ClassName"  
include\_path =\> [‘/path/ClassName.pb.rb']  
}  
}  
}

Is this a bug of logstash-input-kafka plugin, or does I miss some configurations?

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<div class="post-metadata">

**Author:** ![aimerlee860](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@aimerlee860](https://discuss.elastic.co/u/aimerlee860)\
**Post date:** [May 25, 2017, 4:23pm UTC](https://discuss.elastic.co/t/logstash-input-kafka-modify-non-ascii/87063/2 "2017-05-25T16:23:15Z")

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Problem solved by adding:

value\_deserializer\_class =\> "org.apache.kafka.common.serialization.ByteArrayDeserializer"

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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:** [June 22, 2017, 4:23pm UTC](https://discuss.elastic.co/t/logstash-input-kafka-modify-non-ascii/87063/3 "2017-06-22T16:23:19Z")

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