Spring Boot 3.2.5 log pattern level does not work as expected

[Mr-LiuDC]

Spring Boot 3.2.5 log pattern level does not work as expected

[mhalbritter]

Hello,

what are you trying to achieve? If you're trying to use correlated logging (log span and trace ids), Spring Boot 3.2.x supports this out of the box: https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#actuator.micrometer-tracing.logging

If that doesn't fix your issue, please attach a sample project which we can unzip or clone. Thanks!

[Mr-LiuDC]

As shown in the screenshot, in spring boot 3.2.5 the application name, log span and trace ids are displayed repeatedly, only the logging.pattern.level in green is enough.

[mhalbritter]

The duplicated application name, span id and trace id in the logs with Boot 3.2.x are happening because you set the logging pattern for the level to include them:

logging.pattern.level=%5p [${spring.application.name:},%X{traceId:-},%X{spanId:-}]

this works in Boot 3.1.x, as Boot 3.1.x has no built-in support itself for trace id and span id.

In Boot 3.2.x, this support has been added. There's a new property called logging.pattern.correlation, which contains the trace id and the span id, and which is logged by default if tracing is enabled in the application. Additionally, there's logging.include-application-name which defaults to true and adds the application name to the log.

So now there are multiple variables (logging.pattern.level and logging.pattern.correlation and logging.include-application-name) which contain the application name, trace id and span id. Hence the duplicated stuff in your screenshot.

To fix your setup in 3.2.x, remove [${spring.application.name:},%X{traceId:-},%X{spanId:-}] from logging.pattern.level and, if you need to customize trace id / span id logging, use logging.pattern.correlation.

I'm going to add something to the upgrade guide about that.