vkolomeyko opened a new issue, #2703:
URL: https://github.com/apache/logging-log4j2/issues/2703
## Description
The effect of `-Dlog4j.debug=false` has changed in v2.23.1
## Configuration
**Version:** 2.23.1
**Operating system:** Windows
**JDK:** zulu17.46.19-ca-jdk17.0.9-win_x64
## Reproduction
Consider the following Java program:
```
package org.example;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class Main {
public static void main(String[] args) {
System.setProperty("log4j.debug", "false");
Logger log = LogManager.getLogger(Main.class);
log.error("Hello world!");
}
}
```
With Log4j `v2.23.0` it prints:
```
15:20:02.690 [main] ERROR org.example.Main - Hello world!
```
as expected.
However, when version is upgraded to `v2.23.1`, the output becomes a lot
more verbose:
```
...
2024-07-03T14:23:42.658351400Z main TRACE Using default SystemClock for
timestamps.
2024-07-03T14:23:42.658351400Z main DEBUG
org.apache.logging.log4j.core.util.SystemClock supports precise timestamps.
2024-07-03T14:23:42.658351400Z main TRACE Using DummyNanoClock for
nanosecond timestamps.
2024-07-03T14:23:42.658351400Z main DEBUG Reconfiguration complete for
context[name=1d44bcfa] at URI NULL_SOURCE
(org.apache.logging.log4j.core.LoggerContext@67e2d983) with optional
ClassLoader: null
2024-07-03T14:23:42.658351400Z main DEBUG Shutdown hook enabled. Registering
a new one.
2024-07-03T14:23:42.659352600Z main DEBUG LoggerContext[name=1d44bcfa,
org.apache.logging.log4j.core.LoggerContext@67e2d983] started OK.
15:23:42.661 [main] ERROR org.example.Main - Hello world!
2024-07-03T14:23:42.663882800Z pool-1-thread-1 DEBUG Stopping
LoggerContext[name=1d44bcfa,
org.apache.logging.log4j.core.LoggerContext@67e2d983]
2024-07-03T14:23:42.664881900Z pool-1-thread-1 DEBUG Stopping
LoggerContext[name=1d44bcfa,
org.apache.logging.log4j.core.LoggerContext@67e2d983]...
2024-07-03T14:23:42.664881900Z pool-1-thread-1 TRACE Unregistering 1 MBeans:
[org.apache.logging.log4j2:type=1d44bcfa]
...
```
which is unexpected.
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