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From Jun Rao <jun...@gmail.com>
Subject Re: error when producer try to connect to zookeeper
Date Mon, 11 Jun 2012 14:29:46 GMT
It seems that you ZK session has expired. This typically means that your ZK
client is GC-ing. You can either fix the GC or increase the ZK session
timeout.

Thanks,

Jun

On Mon, Jun 11, 2012 at 5:35 AM, 刘明敏 <diveintotomorrow@gmail.com> wrote:

> The topology of our kafka cluster is 1 producer,3 broker servers and 2
> consumers
> The whole system runs well for several days,and yesterday we found that the
> producer kept connect and disconnect and then re-connect to the zookeeper.
>
> below are the log that I thought might be relevant
> *
> *
> *producer(10.18.10.4):*
> [2012-06-11 17:25:55,315] INFO Socket connection established to zk-node-1/
> 10.18.10.1:2181, initiating session (org.apache.zookeeper.ClientCnxn)
> [2012-06-11 17:25:55,339] INFO Session establishment complete on
> serverzk-node-1/
> 10.18.10.1:2181, sessionid = 0x1379e52e0de154d, negotiated timeout = 6000
> (org.apache.zookeeper.ClientCnxn)
> [2012-06-11 17:25:55,339] INFO zookeeper state changed (SyncConnected)
> (org.I0Itec.zkclient.ZkClient)
> [2012-06-11 17:27:00,220] INFO Client session timed out, have not heard
> from server in 46827ms for sessionid 0x1379e52e0de154d, closing socket
> connection and attempting reconnect (org.apache.zookeeper.      ClientCnxn)
> [2012-06-11 17:27:00,320] INFO zookeeper state changed (Disconnected)
> (org.I0Itec.zkclient.ZkClient)
> [2012-06-11 17:27:00,988] INFO Unable to reconnect to ZooKeeper service,
> session 0x1379e52e0de154d has expired, closing socket connection
> (org.apache.zookeeper.ClientCnxn)
>
>
> *zk node 1(10.18.10.1):*
> 25230 2012-06-11 17:25:55,365 - INFO  [CommitProcessor:1:NIOServerCnxn@1580
> ]
> - Established session 0x1379e52e0de154d with negotiated timeout 6000 for
> client /10.18.10.4:36134    // 10.18.10.4 is producer
> 25231 2012-06-11 17:26:22,004 - INFO  [CommitProcessor:1:NIOServerCnxn@1435
> ]
> - Closed socket connection for client /10.18.10.4:36134 which had
> sessionid
> 0x1379e52e0de154d
>
>
> *zk node 2:*
> 2012-06-11 17:26:22,001 - INFO  [SessionTracker:ZooKeeperServer@316] -
> Expiring session 0x1379e52e0de154d, timeout of 6000ms exceeded
> 2012-06-11 17:26:22,001 - INFO  [ProcessThread:-1:PrepRequestProcessor@399
> ]
> - Processed session termination for sessionid: 0x1379e52e0de154d
> 2012-06-11 17:27:01,011 - INFO  [NIOServerCxn.Factory:
> 0.0.0.0/0.0.0.0:2181:NIOServerCnxn$Factory@251] - Accepted socket
> connection from /10.18.10.4:25923
> 2012-06-11 17:27:01,012 - INFO  [NIOServerCxn.Factory:
> 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@770] - Client attempting to renew
> session 0x1379e52e0de154d at /10.18.10.4:25923
> 2012-06-11 17:27:01,012 - INFO  [NIOServerCxn.Factory:
> 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1573] - Invalid session
> 0x1379e52e0de154dfor client
> /10.18.10.4:25923, probably expired
> 2012-06-11 17:27:01,013 - INFO  [NIOServerCxn.Factory:
> 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1435] - Closed socket connection for
> client /10.18.10.4:25923 which had sessionid 0x1379e52e0de154d
>
>
> *zk node 3:*
> (content has been rotated when I remembered to copy the content from
> log,while it is similar with zk node 1 and 2)
>
> --
> Best Regards
>
> ----------------------
> 刘明敏 | mmLiu
>

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