afedulov opened a new issue #27:
URL: https://github.com/apache/pulsar-adapters/issues/27
**Describe the bug**
```
new PulsarKafkaProducer<>(
props, new StringSerializer(), new StringSerializer<>());
```
fails with
```
org.apache.kafka.common.config.ConfigException: Missing required
configuration "key.serializer" which has no default value.
```
Similarly, PulsarKafkaConsumer fails with missing
`key.deserializer/value.serializer`.
**To Reproduce**
```
import java.util.Properties;
import org.apache.kafka.clients.producer.PulsarKafkaProducer;
import org.apache.kafka.common.serialization.StringSerializer;
public class ReproducePulsarBug {
public static void main(String[] args) {
Properties props = new Properties();
props.put("bootstrap.servers", "pulsar://localhost:49377");
// Only works if below two lines are commented in:
// props.put("key.serializer", StringSerializer.class.getName());
// props.put("value.serializer", StringSerializer.class.getName());
new PulsarKafkaProducer<>(
props, new StringSerializer(), new StringSerializer());
}
}
```
**Additional context**
```
<dependency>
<groupId>org.apache.pulsar</groupId>
<artifactId>pulsar-client-kafka-original</artifactId>
<version>2.8.0</version>
</dependency>
```
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