Github user brightchen commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/321#discussion_r67777113
--- Diff:
kafka/src/main/java/org/apache/apex/malhar/kafka/KafkaConsumerWrapper.java ---
@@ -74,7 +75,7 @@
private static final Logger logger =
LoggerFactory.getLogger(KafkaConsumerWrapper.class);
- private boolean isAlive = false;
--- End diff --
In AbstractKafkaInputOperator operator, a new thread of consumerWrapper
will be started:
@Override
public void activate(Context.OperatorContext context)
{
consumerWrapper.start(isIdempotent());
}
which in fact created a thread pool to execute
// create thread pool for consumer threads
kafkaConsumerExecutor = Executors.newCachedThreadPool(
new
ThreadFactoryBuilder().setNameFormat("kafka-consumer-%d").build());
@Override
public void deactivate()
{
consumerWrapper.stop();
}
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