Arthas调整log日志等级

阿里的开源Java诊断工具Arthas可以在线调整log等级

1. 查找当前类的classloader hashcode

sc -d com.example.demo.arthas.user.UserController | grep classLoaderHash

2. 用OGNL获取logger

ognl -c 1be6f5c3 '@com.example.demo.arthas.user.UserController@logger'

3. 单独设置UserController的logger level

ognl -c 1be6f5c3 '@com.example.demo.arthas.user.UserController@logger.setLevel(@ch.qos.logback.classic.Level@DEBUG)'

4. 全局设置logger level

ognl -c 1be6f5c3 '@org.slf4j.LoggerFactory@getLogger("root").setLevel(@ch.qos.logback.classic.Level@DEBUG)'