Issues with Java 17 CompletableFuture Timing Out When Combined with Scheduled Executors
I'm testing a new approach and I'm experimenting with I'm experimenting with I'm reviewing some code and I'm encountering a problem with `CompletableFuture` timing out when used in conjunction with a `ScheduledExecutorService`..... I'm using Java 17 and have the following setup where I want to execute a task every 5 seconds and wait for it to complete, but I'm getting a `TimeoutException` unexpectedly. My code looks like this: ```java import java.util.concurrent.*; public class ScheduledTaskExample { private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); public void startTask() { CompletableFuture<Void> future = new CompletableFuture<>(); scheduler.scheduleAtFixedRate(() -> { try { // Simulating long-running task Thread.sleep(7000); future.complete(null); } catch (InterruptedException e) { future.completeExceptionally(e); } }, 0, 5, TimeUnit.SECONDS); try { future.get(3, TimeUnit.SECONDS); } catch (TimeoutException e) { System.out.println("Task timed out"); future.complete(null); // Complete it anyway to avoid hanging } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { new ScheduledTaskExample().startTask(); } } ``` I expected the task to execute every 5 seconds and complete without timing out, but it seems that the `Thread.sleep(7000)` inside the scheduled task is causing the timeout in `future.get(3, TimeUnit.SECONDS)`. However, since the task is scheduled to run every 5 seconds, I thought using `CompletableFuture` would allow for proper completion handling. I've tried increasing the timeout duration in the `get` method to 10 seconds, but the `TimeoutException` still occurs, which doesn't seem logical to me as the scheduled task should be completing at intervals. Is there a proper way to manage the timing for this combination of `CompletableFuture` and `ScheduledExecutorService` to avoid such timeouts? Are there best practices or patterns I might be overlooking? Any ideas how to fix this? This is for a microservice running on Windows 11. I'd love to hear your thoughts on this. I'd love to hear your thoughts on this. This issue appeared after updating to Java 3.9. Any pointers in the right direction? This is happening in both development and production on Windows 10. What would be the recommended way to handle this?