couldnt connect to discovered master - hazelcast

Question

我想爲兩個tomcat實例之間的pub/sub設置一個hazelcast主題。首先，我只有一個servlet，它在Tomcat啓動時初始化Hazelcast並創建主題。當通過HTTP GET調用時，這個servlet還會將消息發佈到主題。這裏是我的init（）方法在servlet：

Config cfg = new Config(); 

System.out.println("hzapp: Creating hazelcast instance..."); 
hzInstance = Hazelcast.newHazelcastInstance(cfg); 
System.out.println("hzapp: Created hazelcast instance."); 

topic = hzInstance.getTopic("my-topic"); 

System.out.println("hzapp: Adding listener to the topic..."); 
topic.addMessageListener(new HzMessageListener()); 
System.out.println("hzapp: listener added to the topic."); 

的servlet中的doGet（REQ，RES）方法只是將消息發佈到這樣的話題：

String message = request.getParameter("message"); 
System.out.println("hzapp: publishing message: " + message); 
topic.publish(message); 
System.out.println("hzapp: published message: " + message); 

的HzMessageListener什麼都不做但打印收到的消息：

public void onMessage(Message<String> message) { 
    System.out.println("hzapp: Message Received: " + message.getMessageObject()); 
} 

現在，我面臨的問題是，當我啓動tomcat，它給了我下面的錯誤：

INFO: Starting Servlet Engine: Apache Tomcat/6.0.36 
hzapp: Creating hazelcast instance... 
Jan 23, 2014 10:43:26 AM com.hazelcast.instance.DefaultAddressPicker 
INFO: Prefer IPv4 stack is true. 
Jan 23, 2014 10:43:26 AM com.hazelcast.instance.DefaultAddressPicker 
INFO: Picked Address[192.168.1.10]:5702, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0%0,localport=5702], bind any local is true 
Jan 23, 2014 10:43:26 AM com.hazelcast.system 
INFO: [192.168.1.10]:5702 [dev] Hazelcast Community Edition 3.1.4 (20140111) starting at Address[192.168.1.10]:5702 
Jan 23, 2014 10:43:26 AM com.hazelcast.system 
INFO: [192.168.1.10]:5702 [dev] Copyright (C) 2008-2013 Hazelcast.com 
Jan 23, 2014 10:43:26 AM com.hazelcast.instance.Node 
INFO: [192.168.1.10]:5702 [dev] Creating MulticastJoiner 
Jan 23, 2014 10:43:26 AM com.hazelcast.core.LifecycleService 
INFO: [192.168.1.10]:5702 [dev] Address[192.168.1.10]:5702 is STARTING 
Jan 23, 2014 10:43:26 AM com.hazelcast.nio.SocketConnector 
INFO: [192.168.1.10]:5702 [dev] Connecting to /192.168.1.10:5701, timeout: 0, bind-any: true 
Jan 23, 2014 10:43:26 AM com.hazelcast.nio.TcpIpConnectionManager 
INFO: [192.168.1.10]:5702 [dev] 55635 accepted socket connection from /192.168.1.10:5701 
Jan 23, 2014 10:43:50 AM com.hazelcast.instance.Node 
WARNING: [192.168.1.10]:5702 [dev] Trying to rejoin: 
====================================================== 
Couldn't connect to discovered master! tryCount: 50 
address: Address[192.168.1.10]:5702 
masterAddress: Address[192.168.1.10]:5701 
multicast: true 
connection: null 
====================================================== 

任何想法這裏怎麼了？我正在使用Hazelcast 3.1.4版本，並且在WEB-INF/lib中有hazelcast-all-3.1.4.jar。

的什麼我都試過不管，它永遠不會超越Hazelcast.newHazelcastInstance(cfg);

Answer 1

你能與TCP IP發現的，而不是多播嘗試，以確保沒有比多播其他的問題是：

Config config = new Config(); 
JoinConfig join = config.getNetworkConfig().getJoin(); 
join.getMulticastConfig().setEnabled(false); 
join.getTcpIpConfig().setEnabled(true); 

然後我們縮小了問題的範圍。這可能是你的網絡不支持多播btw ..這可能是原因。