code: package io.ray.test;
  
  import static io.ray.runtime.util.SystemUtil.pid;
  
  import com.google.common.collect.ImmutableList;
  import io.ray.api.ActorHandle;
  import io.ray.api.ObjectRef;
  import io.ray.api.Ray;
  import io.ray.api.exception.RayActorException;
  import io.ray.api.options.ActorCreationOptions;
  import io.ray.runtime.task.TaskExecutor;
  import io.ray.runtime.util.SystemUtil;
  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import org.testng.Assert;
  import org.testng.annotations.Test;
  
  @Test(groups = {"cluster"})
  public class ExitActorTest extends BaseTest {
  
    private static class ExitingActor {
  
      int counter = 0;
  
      public Integer incr() {
        return ++counter;
      }
  
      public int getPid() {
        return pid();
      }
  
      public int getSizeOfActorContextMap() {
        TaskExecutor taskExecutor = TestUtils.getRuntime().getTaskExecutor();
        try {
          Field field = TaskExecutor.class.getDeclaredField("actorContextMap");
          field.setAccessible(true);
          return ((Map<?, ?>) field.get(taskExecutor)).size();
        } catch (Exception e) {
          throw new RuntimeException(e);
        }
      }
  
      public boolean exit() {
        Ray.exitActor();
        return false;
      }
    }
  
    public void testExitActor() throws IOException, InterruptedException {
      ActorHandle<ExitingActor> actor =
          Ray.actor(ExitingActor::new).setMaxRestarts(ActorCreationOptions.INFINITE_RESTART).remote();
      Assert.assertEquals(1, (int) (actor.task(ExitingActor::incr).remote().get()));
      int pid = actor.task(ExitingActor::getPid).remote().get();
      Runtime.getRuntime().exec("kill -9 " + pid);
  
      while (true) {
        TimeUnit.SECONDS.sleep(1);
        try {
          actor.task(ExitingActor::getPid).remote().get();
          break;
        } catch (RayActorException e) {
          continue;
        }
      }
  
      // Make sure this actor can be reconstructed.
      Assert.assertEquals(1, (int) actor.task(ExitingActor::incr).remote().get());
  
      // `exitActor` will exit the actor without reconstructing.
      ObjectRef<Boolean> obj = actor.task(ExitingActor::exit).remote();
      Assert.assertThrows(RayActorException.class, obj::get);
    }
  
    public void testExitActorWithDynamicOptions() {
      ActorHandle<ExitingActor> actor =
          Ray.actor(ExitingActor::new)
              .setMaxRestarts(ActorCreationOptions.INFINITE_RESTART)
              // Set dummy JVM options to start a worker process with only one worker.
              .setJvmOptions(ImmutableList.of("-Ddummy=value"))
              .remote();
      int pid = actor.task(ExitingActor::getPid).remote().get();
      Assert.assertTrue(SystemUtil.isProcessAlive(pid));
      ObjectRef<Boolean> obj1 = actor.task(ExitingActor::exit).remote();
      Assert.assertThrows(RayActorException.class, obj1::get);
      // Now the actor shouldn't be reconstructed anymore.
      Assert.assertThrows(
          RayActorException.class, () -> actor.task(ExitingActor::getPid).remote().get());
      // Now the worker process should be dead.
      Assert.assertTrue(TestUtils.waitForCondition(() -> !SystemUtil.isProcessAlive(pid), 5000));
    }
  }
  