Unable to override org.springframework logging levels since 2.1.0.M2

[docent]

Since 2.1.0M2, overriding Spring logging levels in dev mode using logback-spring.xml doesn't work. Attaching a project generated with Initializr, with logback-spring.xml file (that lowers spring level to WARN) added in resources
demo (8).zip. To reproduce:

• run gradlew bootRun
• observe log messages
• revert boot version to 2.1.0.M1 in build.gradle
• run gradlew bootRun again and watch spring related log entries disappear

On a side note, I'm not sure if the decision to include these DEBUG logs by default, even in dev mode, was well thought. The result is a lot of unhelpful information in the log. Frankly I would rather leave the DEBUG off by default, as 99% percent of the time I don't need these logs while developing.

Also reported here

[snicoll]

I think this report is much wider than what is happening in practice.

Unable to override logging levels

Just to be sure we're taking about the same thing, I assume you mean certain org.springframework log levels. Overriding of other levels should work fine.

[docent]

Yeah, I mean overriding org.springframework log levels, e.g.:

<configuration>
    <include resource="org/springframework/boot/logging/logback/base.xml" />
    <logger name="org.springframework" level="warn"/>
</configuration>

[snicoll]

See #13511

[philwebb]

The additional output only happens when devtools is present. I think it's due to this change