rocketMQ启动时出现 找不到或没法加载主类 org.apache.rocketmq.namesrv.NamesrvStartup

错误以下：web Java HotSpot(TM) 64-Bit Server VM warning: Using the DefNew young collector with the CMS collector is deprecated and will likely be removed in a future release Java HotSpot(TM) 64-Bit Server

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