java - Gradle:MessageIOException:无法将消息 [EndOfStream] 写入 127.0.0.1(防火墙)？

Question

我写了一个简单的测试项目，打开9123端口一段时间后退出:

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.charset.Charset;
import java.util.Date;

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.core.service.IoHandler;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
public class TimeServer
{
    private static final int PORT = 9123;
    public static void main( String[] args ) throws IOException
    {
        IoAcceptor acceptor = new NioSocketAcceptor();
        acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );
        acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));
        acceptor.setHandler( new TimeServerHandler() );
        acceptor.getSessionConfig().setReadBufferSize( 2048 );
        acceptor.getSessionConfig().setIdleTime( IdleStatus.BOTH_IDLE, 10 );
        acceptor.bind( new InetSocketAddress(PORT) );
    }

    private static class TimeServerHandler extends IoHandlerAdapter {
        @Override
        public void exceptionCaught(IoSession session, Throwable cause ) throws Exception
        {
            cause.printStackTrace();
        }
        @Override
        public void messageReceived( IoSession session, Object message ) throws Exception
        {
            String str = message.toString();
            if( str.trim().equalsIgnoreCase("quit") ) {
                session.close();
                return;
            }
            Date date = new Date();
            session.write( date.toString() );
            System.out.println("Message written...");
        }
        @Override
        public void sessionIdle( IoSession session, IdleStatus status ) throws Exception
        {
            System.out.println( "IDLE " + session.getIdleCount( status ));
        }
    }
}

...

import java.io.IOException;

public class TimeServerTest {


   @Test
   public void runningTimeServerForTime() throws IOException, InterruptedException {

      int period = 15000;

      System.out.println("Running time server for " + period + "ms");

      TimeServer.main(new String[] {});

      Thread.sleep(period);

      System.out.println("Done, exiting");

      System.exit(0);

   }
}

此测试在 IntelliJ 下和 Windows 防火墙关闭时运行正常。

当windows防火墙打开时，它失败并出现异常

>gradle test
:compileJava
Note: PATH\TimeServer.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:processResources UP-TO-DATE
:classes
:compileTestJava
:processTestResources UP-TO-DATE
:testClasses
:test
Unexpected exception thrown.
org.gradle.messaging.remote.internal.MessageIOException: Could not write message [EndOfStream] to '/127.0.0.1:58895'.
        at org.gradle.messaging.remote.internal.inet.SocketConnection.dispatch(SocketConnection.java:111)
        at org.gradle.messaging.remote.internal.hub.MessageHub$ConnectionDispatch.run(MessageHub.java:284)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
        at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: An existing connection was forcibly closed by the remote host
        at sun.nio.ch.SocketDispatcher.write0(Native Method)
        at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51)
        at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
        at sun.nio.ch.IOUtil.write(IOUtil.java:51)
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
        at org.gradle.messaging.remote.internal.inet.SocketConnection$SocketOutputStream.flush(SocketConnection.java:236)
        at org.gradle.messaging.remote.internal.inet.SocketConnection.dispatch(SocketConnection.java:109)
        ... 6 more

BUILD SUCCESSFUL

发生了什么事？

为什么引用的端口 58895 与打开的端口 9123 有很大不同？

如何在不禁用防火墙的情况下运行此测试？

本次测试加入windows防火墙白名单哪个程序运行正常？

Answer 1

可能与gradle如何处理System.exit()调用有关，参见GRADLE-2759 .

根据经验，在测试中调用 System.exit() 不是一个好主意，因为它可能会扰乱测试框架(如果所有内容都是从同一个启动的JVM？你会突然关闭它)。您应该添加一种正常关闭服务器的方法。

请注意，网络错误似乎与您的网络代码或服务器没有任何关系:您可以从堆栈跟踪中的包名称中看到(org.gradle.messaging.remote.internal) 它来自 Gradle。这就是端口与您指定的端口不同且无关的原因。

不知道为什么这会在关闭 Windows 防火墙的情况下通过。