wuqinghai opened a new issue #1815: When consuming a batch of messages, some messages cannot be rolled back, only all messages can be rolled back URL: https://github.com/apache/rocketmq/issues/1815 Consumer code: consumer.registerMessageListener(new MessageListenerConcurrently() { @Override public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) { System.out.println("接收新消息的线程: "+ Thread.currentThread().getName() +"，消息数: "+msgs.size()); for (int i = 0; i < msgs.size(); i++) { MessageExt ext = msgs.get(i); if (i ==5) { System.out.println("第"+(i)+"条消息消费失败，需要重试"); context.setAckIndex(i); return ConsumeConcurrentlyStatus.RECONSUME_LATER; } System.out.println("第"+(i)+"条消息消费成功，"+ ext.getTopic()+":"+new String(ext.getBody(), Charset.forName("utf-8"))); } return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; } }); if consumer return ConsumeConcurrentlyStatus.RECONSUME_LATER, Consermer'll get all the news of msgs. Why do you write like this？ Why reset it to - 1？ org.apache.rocketmq.client.impl.consumer.ConsumeMessageConcurrentlyService#processConsumeResult switch (status) { case CONSUME_SUCCESS: if (ackIndex >= consumeRequest.getMsgs().size()) { ackIndex = consumeRequest.getMsgs().size() - 1; } int ok = ackIndex + 1; int failed = consumeRequest.getMsgs().size() - ok; this.getConsumerStatsManager().incConsumeOKTPS(consumerGroup, consumeRequest.getMessageQueue().getTopic(), ok); this.getConsumerStatsManager().incConsumeFailedTPS(consumerGroup, consumeRequest.getMessageQueue().getTopic(), failed); break; case RECONSUME_LATER: ackIndex = -1; this.getConsumerStatsManager().incConsumeFailedTPS(consumerGroup, consumeRequest.getMessageQueue().getTopic(), consumeRequest.getMsgs().size()); break; default: break; }
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