zookeeper 集羣 Cannot open channel to X at election address Error contacting service. It is probably n

zookeeper集羣   啓動

 

1.問題現象。 啓動每個都提示  STARTED 可是查看 status時所有節點都報錯

[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.打印日誌 看報錯  所有節點都報這個錯誤

 

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.網上尋求解決方案

1.http://freeman983.iteye.com/blog/2053037   log目錄沒有建立致使出錯 並非緣由。

 

2.http://blog.csdn.net/qianggezhishen/article/details/49363349  （個人配置都是對的 可是仍然報錯）

ZooKeeper安裝使用時遇到各類奇怪問題的解決方法：

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.檢查myid文件數字是否跟配置的能對的上

b.檢查myid文件是否已經拷貝到dataDIr配置的路徑裏了

c.檢查/etc/profile和/etc/environment 是否設置了Java和Zookeeper的路徑

d.Zookeeper集羣節點必須是3個以上

 

3.仍是 歪果仁給力 stackoverflow 查到解決方案：

 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>

 

 

 如願看到： 

[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

 

若是遇到 java.net.NoRouteToHostException: No route to host

建議關閉防火牆試試

Java.net.NoRouteToHostException:No route to host

上網查詢的結論以下：

沒有路由鏈接到本機，沒法到達遠程主機，

緣由：防火牆干擾或中間路由器停機

(用telnet查看該機器是否正常鏈接，結果以下：

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)

解決的辦法是：和防火牆規則有關，關閉防火牆就能夠了

關閉防火牆以後，結果以下：

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