Preload a future no-op task to ensure workQueue.take() will use await with timeout during

premain - otherwise on Java 25 it will load ForkJoinPool which in turn loads ForkJoinTask,
which then means we lose the chance to field-inject context into ForkJoinTask instances

Author: mcculls

internal-api/src/main/java/datadog/trace/util/AgentTaskScheduler.java

@@ -4,6 +4,7 @@
 import static datadog.trace.util.AgentThreadFactory.AgentThread.TASK_SCHEDULER;
 import static datadog.trace.util.AgentThreadFactory.newAgentThread;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.concurrent.TimeUnit.NANOSECONDS;
 import static java.util.concurrent.TimeUnit.SECONDS;
 
@@ -225,6 +226,10 @@ private void prepareWorkQueue() {
     } catch (final InterruptedException e) {
       // ignore, we only want to preload queue internals
     }
+    // preload a future no-op task to ensure workQueue.take() will use await with timeout during
+    // premain - otherwise on Java 25 it will load ForkJoinPool which in turn loads ForkJoinTask,
+    // which then means we lose the chance to field-inject context into ForkJoinTask instances
+    workQueue.offer(FUTURE_NOOP_PLACEHOLDER);
   }
 
   // for testing
@@ -302,6 +307,9 @@ public void run() {
 
   private static final AtomicInteger TASK_SEQUENCE_GENERATOR = new AtomicInteger();
 
+  private static final PeriodicTask<Object> FUTURE_NOOP_PLACEHOLDER =
+      new PeriodicTask<>(null, new Scheduled<>(null), 10, 0, MINUTES);
+
   private static final class PeriodicTask<T> implements Delayed {
 
     private final Task<T> task;