当客户端连接打开时关闭Netty服务器
我正试图关闭一个与它有开放连接的Netty服务器,但它只是挂起。我就是这么做的当客户端连接打开时关闭Netty服务器,netty,Netty,我正试图关闭一个与它有开放连接的Netty服务器,但它只是挂起。我就是这么做的 在一台机器上启动服务器,在另一台机器上启动客户端 将消息从客户端发送到服务器,我将得到响应 使用Ctrl-C关闭服务器 我已经在服务器上注册了一个关闭钩子,它关闭ChannelGroup并调用ServerBootstrap上的releaseExternalResources(或者实际上我正在使用protobuf pro duplex库的DuplexTcpServerBootstrap来实现这一点)。无论如何,关闭
- 在一台机器上启动服务器,在另一台机器上启动客户端
- 将消息从客户端发送到服务器,我将得到响应
- 使用Ctrl-C关闭服务器
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006b0890950> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)
at java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1433)
at org.jboss.netty.util.internal.ExecutorUtil.terminate(ExecutorUtil.java:103)
at org.jboss.netty.channel.socket.nio.AbstractNioWorkerPool.releaseExternalResources(AbstractNioWorkerPool.java:80)
at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.releaseExternalResources(NioServerSocketChannelFactory.java:162)
at org.jboss.netty.bootstrap.Bootstrap.releaseExternalResources(Bootstrap.java:319)
at com.googlecode.protobuf.pro.duplex.server.DuplexTcpServerBootstrap.releaseExternalResources(DuplexTcpServerBootstrap.java:132)
at com.xxx.yyy.node.NodeServer$2.run(NodeServer.java:104)
at java.lang.Thread.run(Thread.java:722)
java.lang.Thread.State:定时等待(停车)
在sun.misc.Unsafe.park(本机方法)
-停车等待(java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
位于java.util.concurrent.locks.LockSupport.parknos(LockSupport.java:226)
位于java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)
位于java.util.concurrent.ThreadPoolExecutor.waiting(ThreadPoolExecutor.java:1433)
位于org.jboss.netty.util.internal.ExecutorUtil.terminate(ExecutorUtil.java:103)
位于org.jboss.netty.channel.socket.nio.AbstractNiowerPool.releaseExternalResources(AbstractNiowerPool.java:80)
位于org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.releaseExternalResources(NioServerSocketChannelFactory.java:162)
位于org.jboss.netty.bootstrap.bootstrap.releaseExternalResources(bootstrap.java:319)
位于com.googlecode.protobuf.pro.duplex.server.DuplexTcpServerBootstrap.releaseExternalResources(DuplexTcpServerBootstrap.java:132)
位于com.xxx.yyy.node.NodeServer$2.run(NodeServer.java:104)
运行(Thread.java:722)
这就是永远不会返回的关闭钩子线程。下面是另一个似乎正在等待频道的线程:
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.interrupt(Native Method)
at sun.nio.ch.EPollArrayWrapper.interrupt(EPollArrayWrapper.java:274)
at sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:193)
- locked <0x00000006b0896660> (a java.lang.Object)
at java.nio.channels.spi.AbstractSelector$1.interrupt(AbstractSelector.java:210)
at java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:216)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:80)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x00000006b08964a8> (a sun.nio.ch.Util$2)
- locked <0x00000006b0896498> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000006b0890d20> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:208)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
java.lang.Thread.State:可运行
at sun.nio.ch.EPollArrayWrapper.interrupt(本机方法)
在sun.nio.ch.EPollArrayWrapper.interrupt处(EPollArrayWrapper.java:274)
在sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:193)
-锁定(一个java.lang.Object)
位于java.nio.channels.spi.AbstractSelector$1.interrupt(AbstractSelector.java:210)
位于java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:216)
位于sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:80)
在sun.nio.ch.SelectorImpl.lock和doselect上(SelectorImpl.java:87)
-锁定(sun.nio.ch.Util$2)
-锁定(java.util.Collections$UnmodifiableSet)
-锁定(sun.nio.ch.EPollSelectorImpl)
在sun.nio.ch.SelectorImpl.select上(SelectorImpl.java:98)
位于org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
位于org.jboss.netty.channel.socket.nio.AbstractNiower.run(AbstractNiower.java:208)
位于org.jboss.netty.channel.socket.nio.niower.run(niower.java:38)
位于org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
位于org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
位于java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
位于java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
运行(Thread.java:722)
我在Linux上使用Netty 3.4.6.Final和Java 7.04。谢谢
比尔,
弗兰克。网络服务器关闭
ChannelFuture cf = serverChannel.close();
cf.awaitUninterruptibly();
bossExecutor.shutdown();
workerExecutor.shutdown();
thriftServer.releaseExternalResources();
裸Netty客户端/服务器也有同样的“问题” 问题是,关闭服务器通道并不会关闭为已接受的客户端连接创建的开放通道。必须明确跟踪服务器中的客户端通道。这可以通过通道组和将客户端通道添加到此组的处理程序来完成。 在关闭服务器时,组中的所有通道都应以批处理方式关闭,而不仅仅是一个服务器通道(也可以放入通道组)
《用户指南》(9.关闭应用程序)和ChannelGroup API文档(使用ChannelGroup简化关闭过程)中有很好的文档说明:我遇到了同样的问题并解决了它。 您必须同步关闭所有
EventLoopGroup
,然后关闭端口
完全关闭可能需要4-5秒
下面是一个示例代码(我认为您应该制作一个带有启动和停止按钮的简单GUI来测试它):
公共类ReusePortServer{
私人最终国际港口;
渠道f;
事件组;
EpollEventLoopGroup-bossGroup;
EpollEventLoopGroup工作组;
公共ReusePortServer(int端口){
this.port=端口;
}
public void start()引发异常{
group=新的EpollEventLoopGroup();
bossGroup=new-EpollEventLoopGroup();
workerGroup=new-EpollEventLoopGroup();
ServerBootstrap b=新的ServerBootstrap();
b、 组(bossGroup、workerGroup)
.channel(epollserverssocketchannel.class)
.option(EpollChannelOption.SO_REUSEPORT,true)
.childHandler(新的通道初始值设定项(){
@凌驾
public void initChannel(SocketChannel ch)引发异常{
ch.pipeline().addLast(新的重用处理器());
}
});
f=b.bind(port.sync();
日志(String.format(“%s已启动并在%s上侦听”,ReusePortServer.class.getName(),f.channel().localAddress());
}
私有最终静态SimpleDataFormat datefmt=新SimpleDataFormat(“HH:mm:ss”);
公共静态无效日志(最终字符串msg)
public class ReusePortServer {
private final int port;
ChannelFuture f;
EventLoopGroup group;
EpollEventLoopGroup bossGroup;
EpollEventLoopGroup workerGroup;
public ReusePortServer(int port) {
this.port = port;
}
public void start() throws Exception {
group = new EpollEventLoopGroup();
bossGroup = new EpollEventLoopGroup();
workerGroup = new EpollEventLoopGroup();
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(EpollServerSocketChannel.class)
.option(EpollChannelOption.SO_REUSEPORT, true)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast(new ReusePortHandler());
}
});
f = b.bind(port).sync();
log(String.format("%s started and listen on %s", ReusePortServer.class.getName(), f.channel().localAddress()));
}
private final static SimpleDateFormat datefmt = new SimpleDateFormat("HH:mm:ss ");
public static void log(final String msg) {
System.out.print(datefmt.format(new Date()));
System.out.println(msg);
System.out.flush();
}
public void stop() {
System.out.println("ReusePortServer.stop");
try {
// shutdown EventLoopGroup
bossGroup.shutdownGracefully().sync();
workerGroup.shutdownGracefully().sync();
f.channel().closeFuture().sync(); // close port
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void main(final String[] args) throws Exception {
int port = 12345;
new ReusePortServer(port).start();
}
}