geosmart commented on pull request #5530:
URL: https://github.com/apache/dolphinscheduler/pull/5530#issuecomment-898829809
with the old code
```
logger.info(" -> {}", String.join("\n\t", logs));
```
the test case is still pass
```
@Test
public void testLogHandler() throws InterruptedException {
List<String> list = Collections.synchronizedList(new ArrayList<>());
Thread thread1 = new Thread(() -> {
for (int i = 0; i < 10; i++) {
list.add("test add log");
}
});
Thread thread2 = new Thread(() -> {
for (int i = 0; i < 10; i++) {
sqoopTask.logHandle(list);
}
});
thread1.start();
thread2.start();
thread1.join();
thread2.join();
// if no exception throw, assert true
Assert.assertTrue(true);
}
```
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