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From kishore g <g.kish...@gmail.com>
Subject Re: ZooKeeper disconnects on controller
Date Sat, 02 May 2015 20:08:56 GMT
Is zookeeper quorum working fine?. Can you run each stat| nc zkhost zkPort
for each zk server and paste the output.
 On May 2, 2015 1:02 PM, "Varun Sharma" <varun@pinterest.com> wrote:

> We are also seeing that all our machines (participants and controller) are
> connecting to the same zookeeper machine which is rather weird - it also
> makes it hard to scale up traffic via observers. Is the following the right
> way to pass the zookeeper string (with comma separation):
>
> zk001:2181, zk002:2181,zk003:2181
>
> Thanks
> Varun
>
> On Fri, May 1, 2015 at 3:32 PM, Varun Sharma <varun@pinterest.com> wrote:
>
>> Hi,
>>
>> We are seeing zookeeper disconnects on the controller and the controller
>> gets into a state from which it cannot reconnect back. We see messages like
>> the ones below over and over again. It keeps trying to re-establish
>> connections against the same session ID and keeps failing. On the other
>> hand, the participants see one hiccup while in their zookeeper connection
>> but gracefully reconnect back. What would cause the controller to keep
>> retrying but failing to connect even after the zookeeper comes back to a
>> healthy state ?
>>
>> 2015-05-01 20:47:02,865 [main-SendThread(terrapinzk001a:2181)]
>> (ClientCnxn.java:1061) INFO  Opening socket connection to server
>> terrapinzk001a/10.115.59.31:2181
>>
>> 2015-05-01 20:47:02,866 [main-SendThread(terrapinzk001a:2181)]
>> (ClientCnxn.java:950) INFO  Socket connection established to terrapinzk001a/
>> 10.115.59.31:2181, initiating session
>>
>> 2015-05-01 20:47:02,880 [main-SendThread(terrapinzk001a:2181)]
>> (ClientCnxn.java:739) INFO  Session establishment complete on server
>> terrapinzk001a/10.115.59.31:2181, sessionid = 0x14d111892390023,
>> negotiated timeout = 30000
>>
>> 2015-05-01 20:47:02,884 [main-EventThread] (ZkClient.java:449) INFO
>> zookeeper state changed (SyncConnected)
>>
>> 2015-05-01 20:47:02,884 [main-SendThread(terrapinzk001a:2181)]
>> (ClientCnxn.java:1186) INFO  Unable to read additional data from server
>> sessionid 0x14d111892390023, likely server has closed socket, closing
>> socket connection and attempting reconnect
>>
>> 2015-05-01 20:47:02,988 [main-EventThread] (ZkClient.java:449) INFO
>> zookeeper state changed (Disconnected)
>>
>
>

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