在springboot集成rocketmq后，发送消息时报异常；此处rocketmq是部署在Windows系统上。

报错信息

org.apache.rocketmq.client.exception.MQBrokerException: CODE: 14  DESC: service not available now. It may be caused by one of the following reasons: the broker's disk is full [CL:  0.92 CQ:  0.92 INDEX:  0.92], messages are put to the slave, message store has been shut down, etc. BROKER: 2.0.0.1:10911
For more information, please visit the url, http://rocketmq.apache.org/docs/faq/

原因分析

检查磁盘空间，多数情况是空间不足造成的。

解决方案

runbroker.sh文件添加set "JAVA_OPT=%JAVA_OPT% -server -Xms512m -Xmx512m -Xmn128m -Drocketmq.broker.diskSpaceWarningLevelRatio=0.99"，使磁盘使用超过99%再报错，根本的解决办法是保证磁盘空间永远不超过90%

然后重启broker服务，到此问题就解决了。