java - hazelcast 配置中自动递增标志的用途

Question

我不完全确定 hazelcast xml 配置文件中自动递增标志的用途。当我关闭它时，我在我的服务器实例中看到多个异常，提示端口 5701 的端口未打开(已在使用)(因为 hazelcast 不再移动到端口 5702 等)。当我使用启用了 tcp 的服务器设置时，为什么 Hazelcast 需要此属性？

运行服务器后，我在日志语句中看到以下内容，它似乎正在监听端口 5701(配置中的默认端口):

Members [1] {
        Member [127.0.0.1]:5701 this
}

2014-09-05 05:46:00,407 INFO c.h.c.LifecycleService [main] [127.0.0.1]:5701 [dev] [3.2.4] Address[127.0.0.1]:5701 is STARTED
2014-09-05 05:46:00,414 INFO c.a.c.n.SendServerEmail [main] hazelcast server email notification for server 192.168.110.154 WildMetrix Hazelcast server launched at 192.168.110.154
2014-09-05 05:46:01,336 INFO c.h.p.InternalPartitionService [hz._hzInstance_1_dev.cached.thread-1] [127.0.0.1]:5701 [dev] [3.2.4] Initializing cluster partition table first arrangement...
2014-09-05 05:46:01,521 INFO c.h.i.DefaultAddressPicker [main] null [dev] [3.2.4] Interfaces is disabled, trying to pick one address from TCP-IP config addresses: [127.0.0.1]
2014-09-05 05:46:01,522 INFO c.h.i.DefaultAddressPicker [main] null [dev] [3.2.4] Picked Address[127.0.0.1]:5702, using socket ServerSocket[addr=/0.0.0.0,localport=5702], bind any local is true
2014-09-05 05:46:01,602 INFO c.h.system [main] [127.0.0.1]:5702 [dev] [3.2.4] Hazelcast 3.2.4 (20140721) starting at Address[127.0.0.1]:5702
2014-09-05 05:46:01,602 INFO c.h.system [main] [127.0.0.1]:5702 [dev] [3.2.4] Copyright (C) 2008-2014 Hazelcast.com
2014-09-05 05:46:01,604 INFO c.h.i.Node [main] [127.0.0.1]:5702 [dev] [3.2.4] Creating TcpIpJoiner
2014-09-05 05:46:01,606 INFO c.h.c.LifecycleService [main] [127.0.0.1]:5702 [dev] [3.2.4] Address[127.0.0.1]:5702 is STARTING
2014-09-05 05:46:01,619 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5703
2014-09-05 05:46:01,620 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5701
2014-09-05 05:46:01,620 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to /127.0.0.1:5703, timeout: 0, bind-any: true
2014-09-05 05:46:01,621 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] Could not connect to: /127.0.0.1:5703. Reason: SocketException[Connection refused to address /127.0.0.1:5703]
2014-09-05 05:46:01,621 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to /127.0.0.1:5701, timeout: 0, bind-any: true
2014-09-05 05:46:01,628 INFO c.h.n.SocketAcceptor [hz._hzInstance_1_dev.IO.thread-Acceptor] [127.0.0.1]:5701 [dev] [3.2.4] Accepting socket connection from /127.0.0.1:46001
2014-09-05 05:46:01,639 INFO c.h.n.TcpIpConnectionManager [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] 46001 accepted socket connection from /127.0.0.1:5701
2014-09-05 05:46:01,639 INFO c.h.n.TcpIpConnectionManager [hz._hzInstance_1_dev.IO.thread-Acceptor] [127.0.0.1]:5701 [dev] [3.2.4] 5701 accepted socket connection from /127.0.0.1:46001
2014-09-05 05:46:38,637 WARN c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Couldn't join to the master : Address[127.0.0.1]:5701
2014-09-05 05:46:38,638 WARN c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Failed to connect, node joined= false, allConnected= false to all other members after 0 seconds.
2014-09-05 05:46:38,638 WARN c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Rebooting after 10 seconds.
2014-09-05 05:46:48,639 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5703
2014-09-05 05:46:48,639 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-1] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to /127.0.0.1:5703, timeout: 0, bind-any: true
2014-09-05 05:46:48,640 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-1] [127.0.0.1]:5702 [dev] [3.2.4] Could not connect to: /127.0.0.1:5703. Reason: SocketException[Connection refused to address /127.0.0.1:5703]
2014-09-05 05:46:48,640 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5701
2014-09-05 05:47:14,648 WARN c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Failed to connect, node joined= false, allConnected= false to all other members after 0 seconds.
2014-09-05 05:47:14,648 WARN c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Rebooting after 10 seconds.
2014-09-05 05:47:24,649 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5703
2014-09-05 05:47:24,649 INFO c.h.c.TcpIpJoiner [main] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to possible member: Address[127.0.0.1]:5701
2014-09-05 05:47:24,649 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] Connecting to /127.0.0.1:5703, timeout: 0, bind-any: true
2014-09-05 05:47:24,650 INFO c.h.n.SocketConnector [hz._hzInstance_2_dev.cached.thread-2] [127.0.0.1]:5702 [dev] [3.2.4] Could not connect to: /127.0.0.1:5703. Reason: SocketException[Connection refused to address /127.0.0.1:5703]

Answer 1

Hazelcast 服务器应尝试绑定(bind)到端口属性中指定的端口。如果默认端口不可用于绑定(bind)，Hazelcast 应该增加端口号(使用端口计数标志)直到它获得一个空闲端口来绑定(bind)。除非弄错了，否则它可能会尝试绑定(bind)三个端口或默认绑定(bind)一个端口 - 将相应地检查和更新。如果您希望 Hazelcast 服务器仅绑定(bind)在一个端口上而不增加，则可以将端口自动增加设置为 false。

<port auto-increment="true" port-count="100">5701</port> 

此外，请确保端口 5701 未被其他进程使用并且可用于绑定(bind)，并且系统上没有任何东西阻止服务器绑定(bind)到该端口，例如任何防火墙等。