rondagostino commented on pull request #11691:
URL: https://github.com/apache/kafka/pull/11691#issuecomment-1075280621
Test passes with this change, but I don't understand why.
`git diff
log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java`
```
diff --git
a/log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java
b/log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java
index 23272a2cb5..edaf6589a7 100644
---
a/log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java
+++
b/log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java
@@ -43,6 +43,7 @@ import static
org.apache.kafka.clients.producer.ProducerConfig.LINGER_MS_CONFIG;
import static
org.apache.kafka.clients.producer.ProducerConfig.MAX_BLOCK_MS_CONFIG;
import static
org.apache.kafka.clients.producer.ProducerConfig.RETRIES_CONFIG;
import static
org.apache.kafka.clients.producer.ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG;
+import static
org.apache.kafka.clients.producer.ProducerConfig.ENABLE_IDEMPOTENCE_CONFIG;
import static org.apache.kafka.common.config.SaslConfigs.SASL_JAAS_CONFIG;
import static
org.apache.kafka.common.config.SaslConfigs.SASL_KERBEROS_SERVICE_NAME;
import static org.apache.kafka.common.config.SaslConfigs.SASL_MECHANISM;
@@ -332,6 +333,7 @@ public class KafkaLog4jAppender extends AppenderSkeleton
{
props.put(KEY_SERIALIZER_CLASS_CONFIG,
ByteArraySerializer.class.getName());
props.put(VALUE_SERIALIZER_CLASS_CONFIG,
ByteArraySerializer.class.getName());
+ props.put(ENABLE_IDEMPOTENCE_CONFIG, false);
this.producer = getKafkaProducer(props);
LogLog.debug("Kafka producer connected to " + brokerList);
LogLog.debug("Logging for topic: " + topic);
```
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