Question

我必须在WAN上创建一个具有单个接收器和多个发送器的集群。问题是，在每个成员中使用相同的clustername调用JChannel.connect()之后，没有创建具有公共视图的公共集群，但每个组件都看到了自己的集群。结果是，当向接收方发送消息时，无法确定后者的物理地址，并且所有消息都被掺杂。

发件人：

package mydemo;

import org.jgroups.Address;
import org.jgroups.JChannel;
import org.jgroups.ReceiverAdapter;

public class Sender {
JChannel channel;
Address receiver;
String group;
String props;
String name;

public Sender(Address rcv, String group, String props, String name) {
    receiver = rcv;
    this.group = group;
    this.props = props;
    this.name = name;
    try {
        channel = new JChannel(props);
        //channel.setName(group);
        channel.connect(group);
        System.out.println("View size(sender): " + channel.getView().getMembers().size());
        System.out.println("Sender address: " + channel.getView().getMembers().get(0));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public void sendMessage() throws Exception {
    channel.send(receiver,"Hello, I am "+name);
}

public void setReceiverAdapter(ReceiverAdapter adapter) {
    channel.setReceiver(adapter);
}

}

接收者：

package mydemo;

import java.util.LinkedList;
import java.util.List;

import org.jgroups.JChannel;
import org.jgroups.Message;
import org.jgroups.ReceiverAdapter;
import org.jgroups.View;

public class ClusterTest extends ReceiverAdapter {
JChannel channel;
List<Sender> senders;

public ClusterTest(int num, String props, String name)
        throws Exception {
    senders = new LinkedList<Sender>();
    channel = new JChannel(props);
    channel.setReceiver(this);
    //channel.setName(name);
    channel.connect(name);
    System.out.println("Rcv address: " + channel.getView().getMembers().get(0));
    for (int i = 0; i < num; i++) {
/*          senders.add(new Sender(channel.getView().getMembers().get(0), name,
                props, "Sender" + i));*/
        senders.add(new Sender(channel.getAddress(), name,
                props, "Sender" + i));
        senders.get(i).setReceiverAdapter(this);
        System.out.println("View size(rcv): " + channel.getView().getMembers().size());
    }
}

public void receive(Message msg) {
    System.out.println("received message " + msg);
}

public void viewAccepted(View view) {
    System.out.println("received view " + view.toString());
}

public void start() throws Exception {
    for (Sender sender : senders) {
        Thread.sleep(3000);
        sender.sendMessage();
    }
    channel.close();
}

public static void main(String[] args) throws Exception {
    new ClusterTest(3, "d:/sth/MyDemo/src/conf/tcp.xml", "TestGroup").start();
}
}

jgroups提供的tcp.xml用于TCPPING中的小改动：

<TCPPING timeout="3000"
         initial_hosts="${jgroups.tcpping.initial_hosts:localhost[7800],localhost[7801],localhost[7802],
            localhost[7803],localhost[7804],localhost[7805],localhost[7806],localhost[7807],localhost[7808],
            localhost[7809],localhost[7810],localhost[7811],localhost[7812],localhost[7813],localhost[7814],
            localhost[7815],localhost[7816]}"
         port_range="10"
         num_initial_members="11"/>

输出：

GMS: address=myhost-42336, cluster=TestGroup, physical address=192.168.3.1:7806

received view [myhost-42336|0] [myhost-42336]

Rcv address: myhost-42336


GMS: address=myhost-48774, cluster=TestGroup, physical address=192.168.3.1:7807

View size(sender): 1

Sender address: myhost-48774

View size(rcv): 1


GMS: address=myhost-38597, cluster=TestGroup, physical address=192.168.3.1:7808

View size(sender): 1

Sender address: myhost-38597

View size(rcv): 1


GMS: address=myhost-55548, cluster=TestGroup, physical address=192.168.3.1:7809

View size(sender): 1

Sender address: myhost-55548

View size(rcv): 1

WARNING: myhost-48774: no physical address for myhost-42336, dropping message

WARNING: myhost-48774: no physical address for myhost-42336, dropping message

WARNING: myhost-38597: no physical address for myhost-42336, dropping message

WARNING: myhost-38597: no physical address for myhost-42336, dropping message

WARNING: myhost-48774: no physical address for myhost-42336, dropping message

...

你能帮帮我吗？也许这个概念是错误的，但由于目标是在WAN上工作，我必须使用单播和TCP。

Answer 1

确保'localhost'不会解析为127.0.0.1，而是解析为您列出的其中一个地址。我建议用-Djgroups.bind_addr = 1.2.3.4启动一个实例，其中1.2.3.4列在'initial_hosts'中。

成员不会形成群集

1 个答案: