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

时间：2023-03-09 05:42:03
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  start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@ip-172-31-29-48 bin]# sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfg
Error 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$QuorumServer@149] - Resolved hostname: node2.vvshop.cc to address: node2.vvshop.cc/54.254.152.81
2016-04-27 01:22:50,088 [myid:1] - WARN  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@400] - Cannot open channel to 3 at election address node3.vvshop.cc/52.221.223.222:3888
java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:381)
        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426)
        at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843)
        at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)
2016-04-27 01:22:50,319 [myid:1] - INFO  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumPeer$QuorumServer@149] - Resolved hostname: node3.vvshop.cc to address: node3.vvshop.cc/52.221.223.222
2016-04-27 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.****.net/qianggezhishen/article/details/49363349  （我的配置都是对的 但是仍然报错）

=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  status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfg
Mode: leader
[root@ip-172-31-23-7 bin]# sh zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfg
Mode: follower
[root@ip-172-31-19-246 bin]# sh zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.8/bin/../conf/zoo.cfg
Mode: 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.****.net/chenyi8888/article/details/8552860