com.alibaba.rocketmq.client.exception.MQBrokerException: delayLevel=null, sendResult=null, errorMsg=CODE: 2 DESC: [TIMEOUT_CLEAN_QUEUE]broker busy, start flow control for a while, period in queue: 401ms, size of queue: 14
解决broker busy
waitTimeMillsInSendQueue=3000
解决system busy
osPageCacheBusyTimeOutMills=3000
#发送消息的最大线程数
sendMessageThreadPoolNums: 64 #large thread numbers
#发送消息是否使用可重入锁
useReentrantLockWhenPutMessage: true
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原文链接：https://blog.csdn.net/u014594604/article/details/95193941