今天down了一个开源项目，启动后一直存在如下错误信息：
ERROR in ch.qos.logback.core.joran.spi.Interpreter@26:42 - no applicable action for [springProfile], current ElementPath is [[configuration][springProfile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:50 - no applicable action for [logger], current ElementPath is [[configuration][springProfile][logger]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@30:35 - no applicable action for [springProfile], current ElementPath is [[configuration][springProfile]]
ERROR in ch.qos.logback.core.joran.spi.Interpreter@31:50 - no applicable action for [logger], current ElementPath is [[configuration][springProfile][logger]]
按照官方文档将logback.xml改为logback-spring.xml后问题解决。
logback.xml和logback-spring.xml都可以用来配置logback，但是两者的加载顺序是不一样的，具体顺序如下：
logback.xml--->application.properties--->logback-spring.xml
从上边的加载顺序可以看出，logback.xml加载早于application.properties，所以如果你在logback.xml使用了变量时，而恰好这个变量是写在application.properties中，那么就会获取不到，报上边的错误信息。