# Using output Kafka Codec Avro with KafkaAvroSerializer (schema\_registry\_url issue)
**URL:** https://discuss.elastic.co/t/using-output-kafka-codec-avro-with-kafkaavroserializer-schema-registry-url-issue/245953
**Category:** Logstash
**Created:** [August 21, 2020, 7:17pm UTC](https://discuss.elastic.co/t/using-output-kafka-codec-avro-with-kafkaavroserializer-schema-registry-url-issue/245953 "2020-08-21T19:17:06Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@belguith\_chachia](https://discuss.elastic.co/u/belguith_chachia)
#### Post date: [August 21, 2020, 7:17pm UTC](https://discuss.elastic.co/t/using-output-kafka-codec-avro-with-kafkaavroserializer-schema-registry-url-issue/245953/1 "2020-08-21T19:17:06Z")
Hi guys,
Our purpose is to post messages to event bus Kafka using Avro.
We added all required jars libraries in `LS_HOME/vendor/jruby/lib/`
And Logstash does recognize KafkaAvroSerializer and all other required classes fine.
The Issue is that logstash needs to specify the SCHEMA\_REGISTRY\_URL
```auto
[logstash.outputs.kafka][main] Unable to create Kafka producer from given configuration {:kafka_error_message=>org.apache.kafka.common.KafkaException: Failed to construct kafka producer, :cause=>io.confluent.common.config.ConfigException: Missing required configuration "schema.registry.url" which has no default value.}
```
But this property could not be passed to the kafka output plugin
```auto
kafka {
codec => avro {
schema_uri => "path/to/Schema.avsc"
tag_on_failure => true
}
retries => 10
bootstrap_servers => "xxx:9092"
topic_id => "xxx"
acks => "all"
message_key => "xxx"
key_serializer=> "io.confluent.kafka.serializers.KafkaAvroSerializer"
value_serializer => "io.confluent.kafka.serializers.KafkaAvroSerializer"
}
```
Here is how our "vendor/lib" looks like
```auto
avro-1.10.0.jar
common-config-5.5.1.jar
jni/
jruby.jar
kafka-avro-serializer-5.3.0.jar
kafka-clients-2.5.0.jar
kafka-schema-registry-client-5.3.0.jar
kafka-streams-avro-serde-5.5.1.jar
ruby/
```
Any one could help with this issue please ?
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [August 21, 2020, 9:19pm UTC](https://discuss.elastic.co/t/using-output-kafka-codec-avro-with-kafkaavroserializer-schema-registry-url-issue/245953/2 "2020-08-21T21:19:54Z")
Take a look at [this](https://discuss.elastic.co/t/logstash-kafka-avro-integration-failing/192499) thread.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 18, 2020, 9:19pm UTC](https://discuss.elastic.co/t/using-output-kafka-codec-avro-with-kafkaavroserializer-schema-registry-url-issue/245953/3 "2020-09-18T21:19:58Z")
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