java - Vert.x取消部署verticle抛出IllegalStateException未知部署

Question

查看 Vert.x 应用程序的日志，我注意到在取消部署 verticle 时出现以下异常(所有 3 个异常都是相同的):

Failed to undeploy netsci.graphservice.verticles.CommandVerticle
Failed to undeploy netsci.graphservice.verticles.QueryVerticle
Failed to undeploy netsci.graphservice.verticles.EventVerticle
java.lang.IllegalStateException: Unknown deployment
    at io.vertx.core.impl.DeploymentManager.undeployVerticle(DeploymentManager.java:203)
    at io.vertx.core.impl.VertxImpl.undeploy(VertxImpl.java:616)
    at microservice.MasterMicroserviceVerticle.undeploySupportingVerticle(MasterMicroserviceVerticle.java:462)
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
    at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1548)
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
    at microservice.MasterMicroserviceVerticle.stopSupportingVerticles(MasterMicroserviceVerticle.java:433)
    at microservice.MasterMicroserviceVerticle.lambda$stop$14(MasterMicroserviceVerticle.java:383)
    at io.vertx.core.Future.lambda$compose$1(Future.java:270)
    at io.vertx.core.impl.FutureImpl.tryComplete(FutureImpl.java:126)
    at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:88)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:152)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:23)
    at io.vertx.core.impl.FutureImpl.setHandler(FutureImpl.java:81)
    at io.vertx.core.Future.lambda$compose$1(Future.java:275)
    at io.vertx.core.impl.FutureImpl.tryComplete(FutureImpl.java:126)
    at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:88)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:152)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:23)
    at io.vertx.core.impl.FutureImpl.tryComplete(FutureImpl.java:126)
    at io.vertx.core.impl.FutureImpl.tryComplete(FutureImpl.java:133)
    at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:95)
    at microservice.MasterMicroserviceVerticle.lambda$null$11(MasterMicroserviceVerticle.java:363)
    at microservice.messaging.impl.BufferKafkaProducerService.lambda$shutdown$2(BufferKafkaProducerService.java:97)
    at io.vertx.core.impl.FutureImpl.setHandler(FutureImpl.java:81)
    at io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:287)
    at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:337)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:445)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
    at java.lang.Thread.run(Thread.java:748)

但是，它们都已部署并具有部署 ID:

Deployed: 213f1978-a595-4af1-8129-29de872e9907
Deployed: e46839f1-2dd2-4cce-9e12-66e09677b97a
Deployed: 8fdfd492-e005-4503-875e-13d73c633b2c

部署 ID 存储在同步映射中，以 verticle 类作为键，部署 ID 作为值。查询时显示存储正确:

class netsci.graphservice.verticles.QueryVerticle: e46839f1-2dd2-4cce-9e12-66e09677b97a
class netsci.graphservice.verticles.CommandVerticle: 8fdfd492-e005-4503-875e-13d73c633b2c
class netsci.graphservice.verticles.EventVerticle: 213f1978-a595-4af1-8129-29de872e9907

在调用 endeploy 之前，如果我检查正在取消部署哪个 verticle，我可以看到有效的部署 ID 正在传递到对 undeploy 的调用中:

Undeploying: e46839f1-2dd2-4cce-9e12-66e09677b97a
Undeploying: 8fdfd492-e005-4503-875e-13d73c633b2c
Undeploying: 213f1978-a595-4af1-8129-29de872e9907

以下是相关代码:

public abstract class MasterMicroserviceVerticle extends MicroserviceVerticle {

  private final Map<Class, String> supportingVerticles =
      Collections.synchronizedMap(new HashMap<Class, String>());

  ...

  private Future<Void> deploySupportingVerticle(Class verticle) {

    Future<Void> future = Future.future();

    vertx.deployVerticle(
        verticle.getName(),
        new DeploymentOptions().setConfig(config()),
        asyncResult -> {
          if (asyncResult.succeeded()) {
            // Assign deployment ID to verticle map.
            String depId = asyncResult.result();
            System.out.println();
            System.out.println();
            System.out.println(depId);
            System.out.println();
            System.out.println();
            supportingVerticles.put(verticle, depId);
            healthStatusService.setHealth(verticle.getName(), HealthStatus.PASSING);
            logger.info("Deployed {}", verticle.getName());
            future.complete();
          } else {
            healthStatusService.setHealth(verticle.getName(), HealthStatus.FAILING);
            logger.error("Failed to deploy {}", verticle.getName(), asyncResult.cause());
            future.fail(asyncResult.cause());
          }
        });

    return future;
  }

  ...

  @Override
  public void stop(Future<Void> stopFuture) throws Exception {

    System.out.println();
    System.out.println();
    System.out.println();
    System.out.println();
    System.out.println();
    for (Class c : supportingVerticles.keySet()) {
      System.out.println(c + ": " + supportingVerticles.get(c));
    }
    System.out.println();
    System.out.println();
    System.out.println();
    System.out.println();
    System.out.println();
    ...
      return mongoFuture;
    }).compose(handler -> {
      Future<Void> verticlesFuture = Future.future();

      stopSupportingVerticles(verticlesFuture.completer());

      return verticlesFuture;
    }).compose(handler ->
      logger.info("Undeployed service");
      stopFuture.completer();
    }, stopFuture);
  }

  protected void stopSupportingVerticles(Handler<AsyncResult<Void>> handler) {

    List<Future> undeployable = supportingVerticles
        .keySet()
        .stream()
        .map(this::undeploySupportingVerticle)
        .collect(Collectors.toList());

    CompositeFuture.all(undeployable)
        .setHandler(asyncResult -> {
          if (asyncResult.succeeded()) {
            handler.handle(Future.succeededFuture());
          } else {
            handler.handle(Future.failedFuture(asyncResult.cause()));
          }
        });
  }

  private Future<Void> undeploySupportingVerticle(Class verticle) {

    Future<Void> future = Future.future();

    System.out.println();
    System.out.println();
    System.out.println("Undeploying: " + supportingVerticles.get(verticle));
    System.out.println();
    System.out.println();
    vertx.undeploy(supportingVerticles.get(verticle), asyncResult -> {
      healthStatusService.setHealth(verticle.getName(), HealthStatus.FAILING);
      if (asyncResult.succeeded()) {
        logger.info("Undeployed {}", verticle.getName());
        future.complete();
      } else {
        logger.error("Failed to undeploy {}", verticle.getName(), asyncResult.cause());
        future.fail(asyncResult.cause());
      }
    });

    return future;
  }
}

请原谅所有的System.out.println()，我把它们放在那里是为了帮助我更好地了解正在发生的事情，并且可能应该在日志中记录这些信息。但现在，我希望您能帮助我理解为什么 Vert.x 说部署未知？

Answer 1

来自Vert.x specs :

You don’t need to manually undeploy child verticles started by a verticle, in the verticle’s stop method. Vert.x will automatically undeploy any child verticles when the parent is undeployed.

您可以通过重写子 verticle 中的 stop() 方法来验证这一点。我想说，当 MasterMicroserviceVerticle 被取消部署时，其他的已经被取消部署。