davidradl commented on code in PR #110:
URL: 
https://github.com/apache/flink-connector-kafka/pull/110#discussion_r2096113219


##########
flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/sink/KafkaSinkBuilder.java:
##########
@@ -61,7 +61,7 @@
 public class KafkaSinkBuilder<IN> {
 
     private static final Logger LOG = 
LoggerFactory.getLogger(KafkaSinkBuilder.class);
-    private static final Duration DEFAULT_KAFKA_TRANSACTION_TIMEOUT = 
Duration.ofHours(1);
+    private static final Duration DEFAULT_KAFKA_TRANSACTION_TIMEOUT = 
Duration.ofMinutes(15);

Review Comment:
   It seems a reasonable change, but I am concerned about changing the default 
of an option. The cautious approach would be to introduce a new parameter with 
the new default, so the user can choose when to move to the new default and 
there are no unexpected changes in behaviour for minor upgrades.  



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