belugabehr commented on pull request #1275:
URL: https://github.com/apache/hive/pull/1275#issuecomment-662082780
```
public static void main(String[] args) throws IOException
{
ExecutorService service = Executors.newFixedThreadPool(2);
CompletionService<Void> completionService = new
ExecutorCompletionService<>(service);
for (int i = 0; i < 10; i++)
{
final int t = i;
completionService.submit(() -> {
clean("File" + t);
return null;
});
}
for (int i = 0; i < 10; ++i) {
try {
completionService.take().get();
} catch (Exception ignore) {}
}
}
public static String clean(String path)
{
return "Cleaned: " + path;
}
```
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