zookeeper 集群 Cannot open channel to X at election address Error contacting service. It is probably not running.

zookeeper集群 启动

1.问题现象。 启动每一个都提示 STARTED 但是查看 status时全部节点都报错

[root@ip-172-31-19-246 bin]# sh zkServer.sh startZooKeeper JMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfgStarting zookeeper ... STARTED

[root@ip-172-31-29-48 bin]# sh zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfgError contacting service. It is probably not running.

2.打印日志 看报错 全部节点都报这个错误

tail -1000f zookeeper.out

2016-04-27 01:22:50,087 [myid:1] - INFO [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumPeer$QuorumServer@149] - Resolved hostname: node2.vvshop.cc to address: node2.vvshop.cc/54.254.152.812016-04-27 01:22:50,088 [myid:1] - WARN [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@400] - Cannot open channel to 3 at election address node3.vvshop.cc/52.221.223.222:3888java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:381) at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426) at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843) at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)2016-04-27 01:22:50,319 [myid:1] - INFO [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumPeer$QuorumServer@149] - Resolved hostname: node3.vvshop.cc to address: node3.vvshop.cc/52.221.223.2222016-04-27 01:22:50,319 [myid:1] - INFO [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:FastLeaderElection@852] - Notification time out: 60000

3.网上寻求解决方案

1.http://freeman983.iteye.com/blog/2053037 log目录没有创建导致出错 并不是原因。

2.http://blog.csdn.net/qianggezhishen/article/details/49363349 （我的配置都是对的 但是仍然报错）

ZooKeeper安装使用时遇到各种奇怪问题的解决方法：

1.nohup：failed to run command ‘Java’: No such file or directory
2.Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

a.检查myid文件数字是否跟配置的能对的上

b.检查myid文件是否已经拷贝到dataDIr配置的路径里了

c.检查/etc/profile和/etc/environment 是否设置了Java和Zookeeper的路径

d.Zookeeper集群节点必须是3个以上

3.还是 歪果仁给力 stackoverflow 查到解决方案：
http://stackoverflow.com/questions/30940981/zookeeper-error-cannot-open-channel-to-x-at-election-address
例如：

server.1=0.0.0.0:2888:3888
server.2=192.168.10.10:2888:3888
server.3=192.168.2.1:2888:3888

Step 1:

Node 1:

zoo.cfg

server.1= 0.0.0.0:<port>:<port2>

server.2= <IP>:<port>:<port2>

.

.

.

server.n= <IP>:<port>:<port2>

Node 2 :

server.1= <IP>:<port>:<port2>

server.2= 0.0.0.0:<port>:<port2>

.

.

.

server.n= <IP>:<port>:<port2>

如愿看到：

[root@ip-172-31-29-48 bin]# sh zkServer.sh statusZooKeeper JMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfgMode: leader

[root@ip-172-31-23-7 bin]# sh zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfgMode: follower

[root@ip-172-31-19-246 bin]# sh zkServer.sh statusZooKeeper JMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfgMode: follower

如果遇到 java.net.NoRouteToHostException: No route to host

建议关闭防火墙试试

Java.net.NoRouteToHostException:No route to host

上网查询的结论如下：

没有路由连接到本机，无法到达远程主机，

原因：防火墙干扰或中间路由器停机

(用telnet查看该机器是否正常连接，结果如下：

Trying 199.155.122.91...
telnet: connect to address 199.155.122.91: No route to host
telnet: Unable to connect to remote host: No route to host)

解决的办法是：和防火墙规则有关，关闭防火墙就可以了

关闭防火墙之后，结果如下：

Trying 199.155.122.91...
telnet: connect to address 199.155.122.91: Connection refused
telnet: Unable to connect to remote host: Connection refused
http://blog.csdn.net/chenyi8888/article/details/8552860