RocketMQ 4.7.1 报错not available now, maybe disk full, maybe your broker machine memory too small

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在Mac上安装RocketMQ 4.7.1后，运行时遇到'not available now, maybe disk full, maybe your broker machine memory too small'的错误。问题源于磁盘空间使用率高达95%，超过RocketMQ默认的90%限制。解决方案是修改RocketMQ配置文件，增加一条设置，并重启broker。相关命令包括启动/关闭nameserver和broker，以及如何自动创建topic。" 8243567,1195931,ASP.NET 实现省市联动选择,"['ASP.NET开发', '前端开发', '数据库交互']

报错背景

今天在Mac上安装了rocketmq 4.7.1的最新版本，程序调用的时候，出现了报错信息如下：

Caused by: org.apache.rocketmq.client.exception.MQBrokerException: CODE: 14  DESC: service not available now, maybe disk full, CL:  0.92 CQ:  0.92 INDEX:  0.92, maybe your broker machine memory too small.
For more information, please visit the url, http://rocketmq.apache.org/docs/faq/
	at org.apache.rocketmq.client.impl.MQClientAPIImpl.processSendResponse(MQClientAPIImpl.java:665) ~[rocketmq-client-4.7.1.jar:4.7.1]
	at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessageSync(MQClientAPIImpl.java:505) ~[rocketmq-client-4.7.1.jar:4.7.1]
	at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessage(MQClientAPIImpl.java:487) ~[rocketmq-client-4.7.1.jar:4.7.1]
	at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessage(MQClientAPIImpl.java:431) ~[rocketmq-client-4.7.1.jar:4.7.1]
	at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendKernelImpl(DefaultMQProducerImpl.java:854) ~[rocketmq-client-4.7.1.jar:4.7.1]
	at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:584) ~[rocketmq-client-4.7.1.jar:4.7.1]
	... 87 common frames omitted

问题定位

检查磁盘空间，已用空间是95％
RocketMQ的默认设置只是支持90％，超过则提示空间不足

解决方案

进入到rocketmq的安装目录下

vi bin/runbroker.sh

在里面增加一行

JAVA_OPT="${JAVA_OPT} -Drocketmq.broker.diskSpaceWarningLevelRatio=0.99"

保存后重启broker

应用案例

https://github.com/matevip/matecloud