henrypoter commented on issue #1671: what is the rightway to use producer send async messages URL: https://github.com/apache/rocketmq/issues/1671#issuecomment-568819605 > Why do you say `only support 5w requests in the queue`? > From the error info of `java.util.concurrent.ThreadPoolExecutor@57536d79[Running, pool size = 8, active threads = 8, queued tasks = 50000, completed tasks = 0]`，I doubt that not even one message was sent successfully. Because the completed task shouldn't be 0. > There must be sth. wrong. Could you please provide more infos？ The ‘completed tasks’ is not always 0. This exception occured because the broker can not process message as quickly as the producer async send. https://github.com/apache/rocketmq/blob/master/client/src/main/java/org/apache/rocketmq/client/impl/producer/DefaultMQProducerImpl.java#L125
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