Spring中的java.net.BindException

Question

我去叫java.net.BindException。我使用Spring自动绑定所有bean，所以我不认为同一进程的两个线程正在运行。另外，我对所有进程使用不同的端口。

此错误的可能原因是什么？有没有办法检查原因？

11:13:48,350  WARN [pool-2-thread-3] Service:215 - Thread exiting main loop due to exception:
    java.lang.RuntimeException: java.net.BindException: Address already in use: JVM_Bind
        at ca.uhn.hl7v2.app.AcceptorThread.afterStartup(AcceptorThread.java:106)
        at ca.uhn.hl7v2.concurrent.Service.run(Service.java:202)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
    Caused by: java.net.BindException: Address already in use: JVM_Bind
        at java.net.DualStackPlainSocketImpl.bind0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketBind(Unknown Source)
        at java.net.AbstractPlainSocketImpl.bind(Unknown Source)
        at java.net.PlainSocketImpl.bind(Unknown Source)
        at java.net.ServerSocket.bind(Unknown Source)
        at java.net.ServerSocket.bind(Unknown Source)
        at ca.uhn.hl7v2.app.AcceptorThread.afterStartup(AcceptorThread.java:103)

编辑:我找到了错误的来源。我使用的是一个实现ApplicationListener<ContextRefreshedEvent>的Spring @Component。该组件在tomcat启动时运行，但当我运行单元测试时，它会再次运行该组件。为什么会发生这种情况？

下面是供参考的组件：

@Component
public class RunBackgroundServices implements ApplicationListener<ContextRefreshedEvent> {

    private final BackgroundServices backgroundServices;

    private ExecutorService executor;

    @Autowired
    public RunBackgroundServices(BackgroundServices backgroundServices) {
        this.backgroundServices= backgroundServices;
    }

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {

        executor = Executors.newSingleThreadExecutor();
        executor.submit(backgroundServices);
    }

    public void onApplicationEvent(ContextStoppedEvent event) {
        executor.shutdown();
     }
}

Answer 1

你使用的端口是什么？看起来你阻止了那个端口，但是你没有释放它。

尝尝这个。

     Linux: netstat -lpn | grep "your port" Then with the pid. kill -9 pid

     Mac: lsof -i tcp:"your port" Then with the pid. kill -9 pid