Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/3314#discussion_r102048475
--- Diff:
flink-connectors/flink-connector-kafka-0.8/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/SimpleConsumerThread.java
---
@@ -373,16 +370,28 @@ else if (partitionsRemoved) {
keyPayload.get(keyBytes);
}
- final T value =
deserializer.deserialize(keyBytes, valueBytes,
-
currentPartition.getTopic(), currentPartition.getPartition(), offset);
-
- if
(deserializer.isEndOfStream(value)) {
- // remove
partition from subscribed partitions.
-
partitionsIterator.remove();
- continue
partitionsLoop;
- }
-
- owner.emitRecord(value,
currentPartition, offset);
+ final Collector<T>
collector = new Collector<T>() {
--- End diff --
I'm not sure of the performance implications for this. The JVM will create
a Collector instance for each record read from Kafka.
I wonder if we can re-use one collector instance here.
Also, I wonder if we need to use this `Collector` implementation, with a
`close()` method we are not using and an exception we are turning into a
`RuntimeException`. Maybe we should let the collect throw an exception?
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