java - 您如何以编程方式为多播发现机制配置hazelcast？

coder 2023-05-18 原文

您如何以编程方式为多播发现机制配置hazelcast？

细节:

documentation仅提供 TCP/IP 示例并且已过时:它使用不再存在的 Config.setPort()。

我的配置看起来像这样，但发现不起作用(即我得到输出 "Members: 1" :

Config cfg = new Config();                  
NetworkConfig network = cfg.getNetworkConfig();
network.setPort(PORT_NUMBER);

JoinConfig join = network.getJoin();
join.getTcpIpConfig().setEnabled(false);
join.getAwsConfig().setEnabled(false);
join.getMulticastConfig().setEnabled(true);

join.getMulticastConfig().setMulticastGroup(MULTICAST_ADDRESS);
join.getMulticastConfig().setMulticastPort(PORT_NUMBER);
join.getMulticastConfig().setMulticastTimeoutSeconds(200);

HazelcastInstance instance = Hazelcast.newHazelcastInstance(cfg);
System.out.println("Members: "+hazelInst.getCluster().getMembers().size());

更新 1，考虑到 asimarslan 的回答

如果我对 MulticastTimeout 感到困惑，我要么得到 "Members: 1"或者

Dec 05, 2013 8:50:42 PM com.hazelcast.nio.ReadHandler WARNING: [192.168.0.9]:4446 [dev] hz._hzInstance_1_dev.IO.thread-in-0 Closing socket to endpoint Address[192.168.0.7]:4446, Cause:java.io.EOFException: Remote socket closed! Dec 05, 2013 8:57:24 PM com.hazelcast.instance.Node SEVERE: [192.168.0.9]:4446 [dev] Could not join cluster, shutting down! com.hazelcast.core.HazelcastException: Failed to join in 300 seconds!

更新 2，考虑到 pveentjer 关于使用 tcp/ip 的回答

如果我将配置更改为以下内容，我仍然只能获得 1 个成员:

Config cfg = new Config();                  
NetworkConfig network = cfg.getNetworkConfig();
network.setPort(PORT_NUMBER);

JoinConfig join = network.getJoin();

join.getMulticastConfig().setEnabled(false);
join.getTcpIpConfig().addMember("192.168.0.1").addMember("192.168.0.2").
addMember("192.168.0.3").addMember("192.168.0.4").
addMember("192.168.0.5").addMember("192.168.0.6").
addMember("192.168.0.7").addMember("192.168.0.8").
addMember("192.168.0.9").addMember("192.168.0.10").
addMember("192.168.0.11").setRequiredMember(null).setEnabled(true);

//this sets the allowed connections to the cluster? necessary for multicast, too?
network.getInterfaces().setEnabled(true).addInterface("192.168.0.*");

HazelcastInstance instance = Hazelcast.newHazelcastInstance(cfg);
System.out.println("debug: joined via "+join+" with "+hazelInst.getCluster()
.getMembers().size()+" members.");

更准确地说，这次运行产生了输出

debug: joined via JoinConfig{multicastConfig=MulticastConfig [enabled=false, multicastGroup=224.2.2.3, multicastPort=54327, multicastTimeToLive=32, multicastTimeoutSeconds=2, trustedInterfaces=[]], tcpIpConfig=TcpIpConfig [enabled=true, connectionTimeoutSeconds=5, members=[192.168.0.1, 192.168.0.2, 192.168.0.3, 192.168.0.4, 192.168.0.5, 192.168.0.6, 192.168.0.7, 192.168.0.8, 192.168.0.9, 192.168.0.10, 192.168.0.11], requiredMember=null], awsConfig=AwsConfig{enabled=false, region='us-east-1', securityGroupName='null', tagKey='null', tagValue='null', hostHeader='ec2.amazonaws.com', connectionTimeoutSeconds=5}} with 1 members.

我的非 Hazelcast 实现使用 UDP 多播并且工作正常。那么防火墙真的是问题所在吗？

更新 3，考虑到 pveentjer 关于检查网络的回答

由于我没有 iptables 或安装 iperf 的权限，我正在使用 com.hazelcast.examples.TestApp检查我的网络是否正常工作，如 Getting Started With Hazelcast 中所述在第 2 章“直接炫耀”一节中:

我打电话java -cp hazelcast-3.1.2.jar com.hazelcast.examples.TestApp在 192.168.0.1 上获取输出

...Dec 10, 2013 11:31:21 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Dec 10, 2013 11:31:21 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.0.1]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Dec 10, 2013 11:31:22 PM com.hazelcast.system
INFO: [192.168.0.1]:5701 [dev] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.0.1]:5701
Dec 10, 2013 11:31:22 PM com.hazelcast.system
INFO: [192.168.0.1]:5701 [dev] Copyright (C) 2008-2013 Hazelcast.com
Dec 10, 2013 11:31:22 PM com.hazelcast.instance.Node
INFO: [192.168.0.1]:5701 [dev] Creating MulticastJoiner
Dec 10, 2013 11:31:22 PM com.hazelcast.core.LifecycleService
INFO: [192.168.0.1]:5701 [dev] Address[192.168.0.1]:5701 is STARTING
Dec 10, 2013 11:31:24 PM com.hazelcast.cluster.MulticastJoiner
INFO: [192.168.0.1]:5701 [dev] 

Members [1] {
    Member [192.168.0.1]:5701 this
}

Dec 10, 2013 11:31:24 PM com.hazelcast.core.LifecycleService
INFO: [192.168.0.1]:5701 [dev] Address[192.168.0.1]:5701 is STARTED

然后我调用 java -cp hazelcast-3.1.2.jar com.hazelcast.examples.TestApp在 192.168.0.2 上获取输出

...Dec 10, 2013 9:50:22 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Dec 10, 2013 9:50:22 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.0.2]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Dec 10, 2013 9:50:23 PM com.hazelcast.system
INFO: [192.168.0.2]:5701 [dev] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.0.2]:5701
Dec 10, 2013 9:50:23 PM com.hazelcast.system
INFO: [192.168.0.2]:5701 [dev] Copyright (C) 2008-2013 Hazelcast.com
Dec 10, 2013 9:50:23 PM com.hazelcast.instance.Node
INFO: [192.168.0.2]:5701 [dev] Creating MulticastJoiner
Dec 10, 2013 9:50:23 PM com.hazelcast.core.LifecycleService
INFO: [192.168.0.2]:5701 [dev] Address[192.168.0.2]:5701 is STARTING
Dec 10, 2013 9:50:23 PM com.hazelcast.nio.SocketConnector
INFO: [192.168.0.2]:5701 [dev] Connecting to /192.168.0.1:5701, timeout: 0, bind-any: true
Dec 10, 2013 9:50:23 PM com.hazelcast.nio.TcpIpConnectionManager
INFO: [192.168.0.2]:5701 [dev] 38476 accepted socket connection from /192.168.0.1:5701
Dec 10, 2013 9:50:28 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.0.2]:5701 [dev] 

Members [2] {
    Member [192.168.0.1]:5701
    Member [192.168.0.2]:5701 this
}

Dec 10, 2013 9:50:30 PM com.hazelcast.core.LifecycleService
INFO: [192.168.0.2]:5701 [dev] Address[192.168.0.2]:5701 is STARTED

所以多播发现通常在我的集群上工作，对吗？ 5701 也是发现端口吗？是 38476在最后输出一个 ID 或一个端口？

加入仍然不适用于我自己的编程配置代码:(

更新 4，考虑到 pveentjer 关于使用默认配置的回答

修改后的 TestApp 给出了输出

joinConfig{multicastConfig=MulticastConfig [enabled=true, multicastGroup=224.2.2.3, 
multicastPort=54327, multicastTimeToLive=32, multicastTimeoutSeconds=2, 
trustedInterfaces=[]], tcpIpConfig=TcpIpConfig [enabled=false, 
connectionTimeoutSeconds=5, members=[], requiredMember=null], 
awsConfig=AwsConfig{enabled=false, region='us-east-1', securityGroupName='null', 
tagKey='null', tagValue='null', hostHeader='ec2.amazonaws.com', connectionTimeoutSeconds=5}}

并在几秒钟后检测到其他成员(如果所有实例同时启动，则在每个实例一次仅将自己列为成员后)，而

myProgram 给出输出

joined via JoinConfig{multicastConfig=MulticastConfig [enabled=true, multicastGroup=224.2.2.3, multicastPort=54327, multica\
stTimeToLive=32, multicastTimeoutSeconds=2, trustedInterfaces=[]], tcpIpConfig=TcpIpConfig [enabled=false, connectionTimeoutSecond\
s=5, members=[], requiredMember=null], awsConfig=AwsConfig{enabled=false, region='us-east-1', securityGroupName='null', tagKey='nu\
ll', tagValue='null', hostHeader='ec2.amazonaws.com', connectionTimeoutSeconds=5}} with 1 members.

并且在大约 1 分钟的运行时间内没有检测到成员(我大约每 5 秒计算一次成员)。

但是如果至少有一个 TestApp 实例在集群上同时运行，那么所有 TestApp 实例和所有 myProgram 实例都会被检测到，我的程序工作正常。如果我启动 TestApp 一次，然后并行启动两次 myProgram，TestApp 会提供以下输出:

java -cp ~/CaseStudy/jtorx-1.10.0-beta8/lib/hazelcast-3.1.2.jar:. TestApp
Dec 12, 2013 12:02:15 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Prefer IPv4 stack is true.
Dec 12, 2013 12:02:15 PM com.hazelcast.instance.DefaultAddressPicker
INFO: Picked Address[192.168.180.240]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Dec 12, 2013 12:02:15 PM com.hazelcast.system
INFO: [192.168.180.240]:5701 [dev] Hazelcast Community Edition 3.1.2 (20131120) starting at Address[192.168.180.240]:5701
Dec 12, 2013 12:02:15 PM com.hazelcast.system
INFO: [192.168.180.240]:5701 [dev] Copyright (C) 2008-2013 Hazelcast.com
Dec 12, 2013 12:02:15 PM com.hazelcast.instance.Node
INFO: [192.168.180.240]:5701 [dev] Creating MulticastJoiner
Dec 12, 2013 12:02:15 PM com.hazelcast.core.LifecycleService
INFO: [192.168.180.240]:5701 [dev] Address[192.168.180.240]:5701 is STARTING
Dec 12, 2013 12:02:21 PM com.hazelcast.cluster.MulticastJoiner
INFO: [192.168.180.240]:5701 [dev] 


Members [1] {
    Member [192.168.180.240]:5701 this
}

Dec 12, 2013 12:02:22 PM com.hazelcast.core.LifecycleService
INFO: [192.168.180.240]:5701 [dev] Address[192.168.180.240]:5701 is STARTED
Dec 12, 2013 12:02:22 PM com.hazelcast.management.ManagementCenterService
INFO: [192.168.180.240]:5701 [dev] Hazelcast will connect to Management Center on address: http://localhost:8080/mancenter-3.1.2/
Join: JoinConfig{multicastConfig=MulticastConfig [enabled=true, multicastGroup=224.2.2.3, multicastPort=54327, multicastTimeToLive=32, multicastTimeoutSeconds=2, trustedInterfaces=[]], tcpIpConfig=TcpIpConfig [enabled=false, connectionTimeoutSeconds=5, members=[], requiredMember=null], awsConfig=AwsConfig{enabled=false, region='us-east-1', securityGroupName='null', tagKey='null', tagValue='null', hostHeader='ec2.amazonaws.com', connectionTimeoutSeconds=5}}
Dec 12, 2013 12:02:22 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] Initializing cluster partition table first arrangement...
hazelcast[default] > Dec 12, 2013 12:03:27 PM com.hazelcast.nio.SocketAcceptor
INFO: [192.168.180.240]:5701 [dev] Accepting socket connection from /192.168.0.8:38764
Dec 12, 2013 12:03:27 PM com.hazelcast.nio.TcpIpConnectionManager
INFO: [192.168.180.240]:5701 [dev] 5701 accepted socket connection from /192.168.0.8:38764
Dec 12, 2013 12:03:27 PM com.hazelcast.nio.SocketAcceptor
INFO: [192.168.180.240]:5701 [dev] Accepting socket connection from /192.168.0.7:54436
Dec 12, 2013 12:03:27 PM com.hazelcast.nio.TcpIpConnectionManager
INFO: [192.168.180.240]:5701 [dev] 5701 accepted socket connection from /192.168.0.7:54436
Dec 12, 2013 12:03:32 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] Re-partitioning cluster data... Migration queue size: 181
Dec 12, 2013 12:03:32 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.180.240]:5701 [dev] 

Members [3] {
    Member [192.168.180.240]:5701 this
    Member [192.168.0.8]:5701
    Member [192.168.0.7]:5701
}

Dec 12, 2013 12:03:43 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] Re-partitioning cluster data... Migration queue size: 181
Dec 12, 2013 12:03:45 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] All migration tasks has been completed, queues are empty.
Dec 12, 2013 12:03:46 PM com.hazelcast.nio.TcpIpConnection
INFO: [192.168.180.240]:5701 [dev] Connection [Address[192.168.0.8]:5701] lost. Reason: Socket explicitly closed
Dec 12, 2013 12:03:46 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.180.240]:5701 [dev] Removing Member [192.168.0.8]:5701
Dec 12, 2013 12:03:46 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.180.240]:5701 [dev] 

Members [2] {
    Member [192.168.180.240]:5701 this
    Member [192.168.0.7]:5701
}

Dec 12, 2013 12:03:48 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] Partition balance is ok, no need to re-partition cluster data... 
Dec 12, 2013 12:03:48 PM com.hazelcast.nio.TcpIpConnection
INFO: [192.168.180.240]:5701 [dev] Connection [Address[192.168.0.7]:5701] lost. Reason: Socket explicitly closed
Dec 12, 2013 12:03:48 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.180.240]:5701 [dev] Removing Member [192.168.0.7]:5701
Dec 12, 2013 12:03:48 PM com.hazelcast.cluster.ClusterService
INFO: [192.168.180.240]:5701 [dev] 

Members [1] {
    Member [192.168.180.240]:5701 this
}

Dec 12, 2013 12:03:48 PM com.hazelcast.partition.PartitionService
INFO: [192.168.180.240]:5701 [dev] Partition balance is ok, no need to re-partition cluster data...

我在 TestApp 的配置中看到的唯一区别是

config.getManagementCenterConfig().setEnabled(true);
        config.getManagementCenterConfig().setUrl("http://localhost:8080/mancenter-"+version);

for(int k=1;k<= LOAD_EXECUTORS_COUNT;k++){
    config.addExecutorConfig(new ExecutorConfig("e"+k).setPoolSize(k));
}

所以我在绝望的尝试中也将它添加到了 myProgram 中。但这并没有解决问题——在整个运行过程中，每个实例仍然只将自己检测为成员。

关于 myProgram 运行多长时间的更新

可能是程序运行时间不够长(正如 pveentjer 所说)？

我的实验似乎证实了这一点:
如果时间 t 介于 Hazelcast.newHazelcastInstance(cfg);并初始化 cleanUp() (即不再通过 hazelcast 进行通信并且不再检查成员数量)是

不到 30 秒，没有通信和 members: 1

超过 30 秒:找到所有成员并进行通信(奇怪的是，这似乎发生的时间长于 t - 30 秒)。

30 秒是榛子集群需要的现实时间跨度，还是发生了一些奇怪的事情？这是来自同时运行的 4 个 myPrograms 的日志(查找 hazelcast-members 重叠 30 秒，例如实例 1 和实例 3):

instance 1: 2013-12-19T12:39:16.553+0100 LOG 0 (START) engine started 
looking for members between 2013-12-19T12:39:21.973+0100 and 2013-12-19T12:40:27.863+0100  
2013-12-19T12:40:28.205+0100 LOG 35 (Torx-Explorer) Model  SymToSim is about to\  exit

instance 2: 2013-12-19T12:39:16.592+0100 LOG 0 (START) engine started 
looking for members between 2013-12-19T12:39:22.192+0100 and 2013-12-19T12:39:28.429+0100 
2013-12-19T12:39:28.711+0100 LOG 52 (Torx-Explorer) Model  SymToSim is about to\  exit

instance 3: 2013-12-19T12:39:16.593+0100 LOG 0 (START) engine started 
looking for members between 2013-12-19T12:39:22.145+0100 and 2013-12-19T12:39:52.425+0100  
2013-12-19T12:39:52.639+0100 LOG 54 (Torx-Explorer) Model  SymToSim is about to\  exit

INSTANCE 4: 2013-12-19T12:39:16.885+0100 LOG 0 (START) engine started 
looking for members between 2013-12-19T12:39:21.478+0100 and 2013-12-19T12:39:35.980+0100  
2013-12-19T12:39:36.024+0100 LOG 34 (Torx-Explorer) Model  SymToSim is about to\  exit

只有在 hazelcast 集群中存在足够多的成员后，我如何才能最好地启动我的实际分布式算法？可以设置吗hazelcast.initial.min.cluster.size以编程方式？ https://groups.google.com/forum/#!topic/hazelcast/sa-lmpEDa6A听起来这会阻止 Hazelcast.newHazelcastInstance(cfg);直到达到 initial.min.cluster.size。正确的？不同实例将如何同步(在哪个时间跨度内)解除阻塞？

最佳答案

问题似乎是集群启动(和停止)并且不会等到集群中有足够的成员。您可以设置 hazelcast.initial.min.cluster.size 属性，以防止这种情况发生。

您可以使用以下方法以编程方式设置“hazelcast.initial.min.cluster.size”:

Config config = new Config(); 
config.setProperty("hazelcast.initial.min.cluster.size","3");

关于java - 您如何以编程方式为多播发现机制配置hazelcast？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20385973/

何以 hazelcast 192 168 java configuration multicast

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