Heap memory leak caused OOM

BUG REPORT

1. Please describe the issue you observed:

Heap memory leak caused OOM.

• What did you do (The steps to reproduce)?

@Slf4j
@Component
@RocketMQMessageListener(topic = "${rocketmq.consumer.topic}"
        , consumerGroup ="${rocketmq.consumer.group}")
public class EventListener implements RocketMQListener<Event>, RocketMQPushConsumerLifecycleListener {

    @Override
    public void prepareStart(DefaultMQPushConsumer consumer) {
        consumer.setMaxReconsumeTimes(5);
        consumer.setPullThresholdForTopic(200);
        consumer.setPullThresholdSizeForTopic(100);
    }

    @Override
    public void onMessage(Event message) {

        log.info("The event listener: {}", JSON.toJSONString(message));
    }

}

• What did you expect to see?

Message consumption is normal.

• What did you see instead?

Messages are being consumed, but the old zone is also accumulating.

1. Please tell us about your environment:

JDK 1.8 spring-boot 2.3.2.RELEASE rocketmq-spring-boot-starter 2.2.2

1. Other information (e.g. detailed explanation, logs, related issues, suggestions how to fix, etc):

ps_old_gen always unable to release, after holding for 1-2 days, OOM will occur.

[panzhi33]

Look at the stack information, use litePull, the above code uses push. litePull needs to take the initiative to pull it. If you don’t take the initiative to pull the cancellation fee, it will cache a large number of ConsumeRequest objects.

[panzhi33]

Is litePull also used when using rocketmq-client ? DefaultLitePullConsumerImpl caches a large number of ConsumeRequest objects, and ConsumeRequest also holds message objects,the reason is still consume slowly. can search rocketmq_client.log for ‘The consume request count exceeds’