gharris1727 commented on code in PR #15922:
URL: https://github.com/apache/kafka/pull/15922#discussion_r1599503091
##########
log4j-appender/src/main/java/org/apache/kafka/log4jappender/KafkaLog4jAppender.java:
##########
@@ -349,8 +349,14 @@ protected Producer<byte[], byte[]>
getKafkaProducer(Properties props) {
protected void append(LoggingEvent event) {
String message = subAppend(event);
LogLog.debug("[" + new Date(event.getTimeStamp()) + "]" + message);
- Future<RecordMetadata> response = producer.send(
- new ProducerRecord<>(topic,
message.getBytes(StandardCharsets.UTF_8)));
+ Future<RecordMetadata> response;
Review Comment:
This is in the javadoc for send:
```
* @throws IllegalStateException if a transactional.id has been
configured and no transaction has been started, or
* when send is invoked after producer has
been closed.
```
Idempotence and transactions are not in use for this producer. I am not
aware of another cause of IllegalStateException that isn't documented, but the
documentation could be wrong or there could be a bug, I have no idea.
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