Question

我有一个Camel进程（我从命令行运行），该路由与此类似：

public class ProfilerRoute extends RouteBuilder {

 @Override
 public void configure() {   
    from("kestrel://my_queue?concurrentConsumers=10&waitTimeMs=500")
        .unmarshal().json(JsonLibrary.Jackson, MyClass.class)
        .process(new Processor() {
                 @Override
                 public void process(Exchange exchange) throws Exception {
                     /* Do the real processing [...] */
                     exchange.getIn().setBody(null);
                 }
        })
        .filter(body().isNotNull())
        .to("file://nowhere");
 }
}

请注意，在处理完这些消息后，我正在诋毁任何消息，因为这是一个纯粹的消费者过程

该过程由其自己运行。没有其他进程在队列中写入，队列为空。然而，当我试图杀死这个过程时，这个过程不会消亡。

从日志中我看到以下行（为了便于阅读而缩进）：

[                      Thread-1] MainSupport$HangupInterceptor  INFO  
                                 Received hang up - stopping the main instance.
[                      Thread-1] MainSupport                    INFO
                                 Apache Camel stopping
[                      Thread-1] GuiceCamelContext              INFO
                                 Apache Camel 2.11.1 (CamelContext: camel-1) 
                                 is shutting down
[                      Thread-1] DefaultShutdownStrategy        INFO
                                 Starting to graceful shutdown 1 routes 
                                 (timeout 300 seconds)
[l-1) thread #12 - ShutdownTask] DefaultShutdownStrategy        INFO
                                 Waiting as there are still 10 inflight and 
                                 pending exchanges to complete, 
                                 timeout in 300 seconds.

等等，减少超时。在超时结束时，我得到了日志：

[l-1) thread #12 - ShutdownTask] DefaultShutdownStrategy        INFO
                                 Waiting as there are still 10 inflight and 
                                 pending exchanges to complete,
                                 timeout in 1 seconds.
[                      Thread-1] DefaultShutdownStrategy        WARN
                                 Timeout occurred. 
                                 Now forcing the routes to be shutdown now.
[l-1) thread #12 - ShutdownTask] DefaultShutdownStrategy        WARN
                                 Interrupted while waiting during graceful 
                                 shutdown, will force shutdown now.
[                      Thread-1] KestrelConsumer                INFO  
                                 Stopping consumer for 
                                 kestrel://localhost:22133/my_queue?concurrentConsumers=10&waitTimeMs=500

但是这个过程无论如何都不会死（即使我此时试图杀死它）。

我原本预计在等待时间之后，所有线程都会意识到关闭正在进行并停止。

我已经阅读了"Graceful Shutdown"文档，但是找不到能解释我所面临行为的内容。

从日志中我可以看到我正在使用Apache Camel的2.11.1版本。

更新：根据克劳斯易卜生的说法，这可能是骆驼隼组件的问题。我在骆驼的ASF Jira上提出了一个问题：CAMEL-6632

Answer 1

这是camel-kestrel中的一个错误，并且已记录JIRA票证以解决此问题：https://issues.apache.org/jira/browse/CAMEL-6632

由于（不存在）机上交换，Camel进程不会关闭

1 个答案: