logback, Method printStackTrace() is executed after meeting with method log.debug()

Method e.printStackTrace() is executed after the method log.debug().

maven

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.24</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.4.5</version>
</dependency>`

my code

@Slf4j
public class SleepTest {
    public static void main(String[] args) {
        //Create a thread named "t0" and start it.
        Thread t0 = new Thread(()->{
            log.debug("running...");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            log.debug("continue");
        },"t0");
        t0.start();
        //interrupt "t0"
        t0.interrupt();
    }
}

output

00:09:48 [t0] [DEBUG] com.codingcube.introduction.SleepTest - running...
00:09:48 [t0] [DEBUG] com.codingcube.introduction.SleepTest - bug
00:09:48 [t0] [DEBUG] com.codingcube.introduction.SleepTest - continue
java.lang.InterruptedException: sleep interrupted
	at java.base/java.lang.Thread.sleep(Native Method)
	at com.codingcube.introduction.SleepTest.lambda$main$0(SleepTest.java:14)
	at java.base/java.lang.Thread.run(Thread.java:829)

In the code, log.debug("continue"); comes after e.printStackTrace();, but the output comes before it.

This problem does not occur when I run part of the code in the main thread.

@Slf4j
public class SleepTest {
    public static void main(String[] args) {
        log.debug("running...");
        try {
            Thread.sleep(1000);
            throw new InterruptedException();
        }catch (Exception e){
            e.printStackTrace();
        }
        log.debug("continue");
    }
}

output

00:16:05 [main] [DEBUG] com.codingcube.introduction.SleepTest - running...
java.lang.InterruptedException
	at com.codingcube.introduction.SleepTest.main(SleepTest.java:13)
00:16:06 [main] [DEBUG] com.codingcube.introduction.SleepTest - continue

and the problem does not occur when I remove the first log

@Slf4j
public class SleepTest {
    public static void main(String[] args) {
        //Create a thread named "t0" and start it.
        Thread t0 = new Thread(()->{
            //log.debug("running...");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            log.debug("continue");
        },"t0");
        t0.start();

        //interrupt "t0"
        t0.interrupt();
    }
}

output

java.lang.InterruptedException: sleep interrupted
	at java.base/java.lang.Thread.sleep(Native Method)
	at com.codingcube.introduction.SleepTest.lambda$main$0(SleepTest.java:15)
	at java.base/java.lang.Thread.run(Thread.java:829)
00:18:17 [t0] [DEBUG] com.codingcube.introduction.SleepTest - continue

e.printStackTrace() is executed before log.debug("continue")

The first one writes to stderr and the second one writes probably to stdout.
The output order depends on the order the two streams are flushed and closed.

Try to replace e.printStackTrace() with log.debug("exception",e)