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From Frank Zheng <bearzheng2...@gmail.com>
Subject Re: Cannot Open Channel at Election Address
Date Mon, 08 Oct 2012 02:11:28 GMT
I rechecked myid files. There was no problem.
And the error messages displayed after I had started all servers.

In one machine, the error messages are as follows.

2012-10-08 18:06:29,261 [myid:2] - WARN
[QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2182:QuorumCnxManager@368] - Cannot
open channel to 3 at election address testing.machine1/192.168.0.101:3902
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
    at java.net.Socket.connect(Socket.java:546)
    at
org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:354)
    at
org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:388)
    at
org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:765)
    at
org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:716)
2012-10-08 18:06:29,262 [myid:2] - INFO
[QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2182:QuorumCnxManager@190] - Have
smaller server identifier, so dropping the connection: (4, 2)
2012-10-08 18:06:29,262 [myid:2] - INFO
[QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2182:FastLeaderElection@774] -
Notification time out: 60000

In the other machine, the error messages are like this.

2012-10-08 10:08:37,076 [myid:5] - WARN
[WorkerSender[myid=5]:QuorumCnxManager@368] - Cannot open channel to 3 at
election address testing.machine1/192.168.0.101:3902
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
    at java.net.Socket.connect(Socket.java:546)
    at
org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:354)
    at
org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:327)
    at
org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:393)
    at
org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:365)
    at java.lang.Thread.run(Thread.java:679)
2012-10-08 10:08:37,079 [myid:5] - INFO
[WorkerReceiver[myid=5]:FastLeaderElection@542] - Notification: 5
(n.leader), 0x0 (n.zxid), 0x1 (n.round), LOOKING (n.state), 4 (n.sid), 0x0
(n.peerEPoch), LOOKING (my state)
2012-10-08 10:08:37,079 [myid:5] - INFO
[WorkerReceiver[myid=5]:FastLeaderElection@542] - Notification: 5
(n.leader), 0x0 (n.zxid), 0x1 (n.round), LOOKING (n.state), 5 (n.sid), 0x0
(n.peerEPoch), LOOKING (my state)


These two kinds of error messages keep showing again and again.
When I tried to set up a client and connect on server, an error came up.

[root@testing zookeeper-3.4.4]# bin/zkCli.sh -server testing.machine2:2184
Connecting to testing.machine2:2184
2012-10-08 10:10:38,734 [myid:] - INFO  [main:Environment@100] - Client
environment:zookeeper.version=3.4.4-1386507, built on 09/17/2012 08:33 GMT
2012-10-08 10:10:38,737 [myid:] - INFO  [main:Environment@100] - Client
environment:host.name=testing.machine2
2012-10-08 10:10:38,737 [myid:] - INFO  [main:Environment@100] - Client
environment:java.version=1.6.0_22
2012-10-08 10:10:38,737 [myid:] - INFO  [main:Environment@100] - Client
environment:java.vendor=Sun Microsystems Inc.
2012-10-08 10:10:38,738 [myid:] - INFO  [main:Environment@100] - Client
environment:java.home=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
2012-10-08 10:10:38,738 [myid:] - INFO  [main:Environment@100] - Client
environment:java.class.path=/usr/zookeeper-3.4.4/bin/../build/classes:/usr/zookeeper-3.4.4/bin/../build/lib/*.jar:/usr/zookeeper-3.4.4/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/zookeeper-3.4.4/bin/../lib/slf4j-api-1.6.1.jar:/usr/zookeeper-3.4.4/bin/../lib/netty-3.2.2.Final.jar:/usr/zookeeper-3.4.4/bin/../lib/log4j-1.2.15.jar:/usr/zookeeper-3.4.4/bin/../lib/jline-0.9.94.jar:/usr/zookeeper-3.4.4/bin/../zookeeper-3.4.4.jar:/usr/zookeeper-3.4.4/bin/../src/java/lib/*.jar:/usr/zookeeper-3.4.4/bin/../conf:
2012-10-08 10:10:38,738 [myid:] - INFO  [main:Environment@100] - Client
environment:java.library.path=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64/server:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2012-10-08 10:10:38,738 [myid:] - INFO  [main:Environment@100] - Client
environment:java.io.tmpdir=/tmp
2012-10-08 10:10:38,739 [myid:] - INFO  [main:Environment@100] - Client
environment:java.compiler=<NA>
2012-10-08 10:10:38,739 [myid:] - INFO  [main:Environment@100] - Client
environment:os.name=Linux
2012-10-08 10:10:38,739 [myid:] - INFO  [main:Environment@100] - Client
environment:os.arch=amd64
2012-10-08 10:10:38,739 [myid:] - INFO  [main:Environment@100] - Client
environment:os.version=2.6.32-220.el6.x86_64
2012-10-08 10:10:38,740 [myid:] - INFO  [main:Environment@100] - Client
environment:user.name=root
2012-10-08 10:10:38,740 [myid:] - INFO  [main:Environment@100] - Client
environment:user.home=/root
2012-10-08 10:10:38,740 [myid:] - INFO  [main:Environment@100] - Client
environment:user.dir=/usr/zookeeper-3.4.4
2012-10-08 10:10:38,741 [myid:] - INFO  [main:ZooKeeper@433] - Initiating
client connection, connectString=testing.machine2:2184 sessionTimeout=30000
watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@657d5d2a
Welcome to ZooKeeper!
2012-10-08 10:10:38,768 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@966] -
Opening socket connection to server testing.machine2/192.168.0.103:2184.
Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2012-10-08 10:10:38,773 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@849] - Socket
connection established to testing.machine2/192.168.0.103:2184, initiating
session
2012-10-08 10:10:38,789 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@1085] -
Unable to read additional data from server sessionid 0x0, likely server has
closed socket, closing socket connection and attempting reconnect
[zk: testing.machine2:2184(CONNECTING) 0] 2012-10-08 10:10:40,879 [myid:] -
INFO  [main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@966] -
Opening socket connection to server testing.machine2/192.168.0.103:2184.
Will not attempt to authenticate using SASL (unknown error)
2012-10-08 10:10:40,881 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@849] - Socket
connection established to testing.machine2/192.168.0.103:2184, initiating
session
2012-10-08 10:10:40,884 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@1085] -
Unable to read additional data from server sessionid 0x0, likely server has
closed socket, closing socket connection and attempting reconnect
2012-10-08 10:10:42,418 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@966] -
Opening socket connection to server testing.machine2/192.168.0.103:2184.
Will not attempt to authenticate using SASL (unknown error)
2012-10-08 10:10:42,419 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@849] - Socket
connection established to testing.machine2/192.168.0.103:2184, initiating
session
2012-10-08 10:10:42,422 [myid:] - INFO
[main-SendThread(testing.machine2:2184):ClientCnxn$SendThread@1085] -
Unable to read additional data from server sessionid 0x0, likely server has
closed socket, closing socket connection and attempting reconnect


On Sat, Oct 6, 2012 at 10:25 PM, Patrick Hunt <phunt@apache.org> wrote:

> Were those the early error messages, or after you had started all
> servers and waited a bit? I'd suggest you start them all, then tail
> one of the logs and see what's going on once everyone is started.
> Ensure that you have the "myid" files correct - that each server has a
> distinct server id.
>
> Not sure it will help but try this? (specify count as 5)
> https://github.com/phunt/zkconf
>
> Patrick
>
> On Fri, Oct 5, 2012 at 3:03 AM, Frank Zheng <bearzheng2011@gmail.com>
> wrote:
> > Hi All,
> >
> > I tried to set up a multi-server cluster in two machines, following the
> > instructions on the website.
> > I set up 5 servers (named 1~5) in two machines. The configuration is as
> > follows.
> >
> > tickTime=2000
> > initLimit=10
> > syncLimit=5
> > clientPort=2181
> > dataDir=/var/zookeeper/1
> >
> > server.1=testing.machine1:2900:3900
> > server.2=testing.machine1:2901:3901
> > server.3=testing.machine1:2902:3902
> > server.4=testing.machine2:2903:3903
> > server.5=testing.machine2:2904:3904
> >
> >
> > When I set up the cluster, there was a problem in all the five servers.
> >
> >
> > 2012-10-05 17:51:43,555 [myid:1] - WARN
> > [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@368] - Cannot
> > open channel to 2 at election address testing.machine1/
> 192.168.0.101:3901
> > java.net.ConnectException: Connection refused
> >     at java.net.PlainSocketImpl.socketConnect(Native Method)
> >     at
> >
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
> >     at
> >
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
> >     at
> >
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
> >     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
> >     at java.net.Socket.connect(Socket.java:546)
> >     at
> >
> org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:354)
> >     at
> >
> org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:388)
> >     at
> >
> org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:765)
> >     at
> > org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:716)
> > 2012-10-05 17:51:43,556 [myid:1] - WARN
> > [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@368] - Cannot
> > open channel to 3 at election address testing.machine1/
> 192.168.0.101:3902
> > java.net.ConnectException: Connection refused
> >     at java.net.PlainSocketImpl.socketConnect(Native Method)
> >     at
> >
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
> >     at
> >
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
> >     at
> >
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
> >     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
> >     at java.net.Socket.connect(Socket.java:546)
> >     at
> >
> org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:354)
> >     at
> >
> org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:388)
> >     at
> >
> org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:765)
> >     at
> > org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:716)
> > 2012-10-05 17:51:43,557 [myid:1] - INFO
> > [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@190] - Have
> > smaller server identifier, so dropping the connection: (4, 1)
> > 2012-10-05 17:51:43,558 [myid:1] - INFO
> > [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:FastLeaderElection@774] -
> > Notification time out: 60000
> >
> >
> > I tried in zookeeper-3.3.6 and zookeeper-3.4.4, and got the same problem.
> > Could anyone help me?
> >
> > Thanks
> > Frank
>



-- 
Sincerely,
Zheng Yu
Mobile:  (852) 60670059
Email:    bearzheng2011@gmail.com

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