spring boot configuration logging.config not working in 2.25.0 #3808
Description
Description
My project is deployed using docker, and log4j.xml is placed in the configuration center instead of locally. Use logging.config=./conf/log4j2.xml to specify the configuration file
When using 2.24.3, log4j2 works normally, but when using 2.25.0, there is no log output.
log write configuration is load, but log4j not work.
I tried to compare it with version 2.24.3 and found that there might be a problem
2.25.0 lacks the setConfiguration call, which causes the loaded configuration to not take effect.
// 2.25.0
public void start(final Configuration config) {
LOGGER.info("Starting {}[name={}] with configuration {}...", getClass().getSimpleName(), getName(), config);
if (configLock.tryLock()) {
try {
if (this.isInitialized() || this.isStopped()) {
setStarting();
reconfigure(config);
if (this.configuration.isShutdownHookEnabled()) {
setUpShutdownHook();
}
this.setStarted();
}
} finally {
configLock.unlock();
}
}
LOGGER.info("{}[name={}] started with configuration {}.", getClass().getSimpleName(), getName(), config);
}
// 2.24.3
public void start(final Configuration config) {
LOGGER.info("Starting {}[name={}] with configuration {}...", getClass().getSimpleName(), getName(), config);
if (configLock.tryLock()) {
try {
if (this.isInitialized() || this.isStopped()) {
if (this.configuration.isShutdownHookEnabled()) {
setUpShutdownHook();
}
this.setStarted();
}
} finally {
configLock.unlock();
}
}
setConfiguration(config);
LOGGER.info("{}[name={}] started with configuration {}.", getClass().getSimpleName(), getName(), config);
}Version:
spring boot version: 2.7.18
log4j2 version: 2.25.0
Operating system: linux
JDK: jdk17
Logs
2025-07-08T07:42:04.861760Z main DEBUG Loaded configuration from /Users/xxx/src/zzz/conf/log4j2.xml
2025-07-08T07:42:06.402691Z main INFO Starting LoggerContext[name=76ed5528] with configuration XmlConfiguration[location=/Users/xxx/src/zzz/conf/log4j2.xml, lastModified=2025-07-08T07:42:02.425Z]...
2025-07-08T07:42:06.403729Z main INFO LoggerContext[name=76ed5528] started with configuration XmlConfiguration[location=/Users/xxx/src/zzz/conf/log4j2.xml, lastModified=2025-07-08T07:42:02.425Z].
.