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From "McDermott, Chris Kevin (MSDU - STaTS/StorefrontRemote)" <>
Subject Re: Opening socket connection to server localhost/ Will not attempt to authenticate using SASL (unknown error)
Date Fri, 15 Apr 2016 18:40:47 GMT
Thanks for the explanation, Mark.  I feel much better :-)


On 4/15/16, 2:31 PM, "Mark Payne" <> wrote:

>The INFO level message here is ZooKeeper's way of indicating that you are not configured
>to use Kerberized connections when communicating with the ZooKeeper Server. If you are
>aware of that, then it is no issue. While it indicates that it is an unknown error, it
is not something
>that should be concerning.
>The fact that you are seeing Connection refused likely indicates that either (a) your
>is not configured properly to talk to a ZooKeeper cluster, or (b) that ZooKeeper cluster
is down, or
>(c) you are talking to an embedded ZooKeeper cluster and the other nodes in the ZooKeeper
ensemble just
>have not yet come up. If this is the case, you should see this only on startup, and it
should then go away after
>the other nodes have joined the cluster.
>These warning messages are a bit concerning when you first see them, though. I have created
a ticket [1]
>to look at how we can tone down the ZooKeeper logging to avoid these 'false alarm' log
>[1] <>
>> On Apr 14, 2016, at 3:48 PM, McDermott, Chris Kevin (MSDU - STaTS/StorefrontRemote)
<> wrote:
>> I’m seeing this a lot in my logs.  Does anyone have any idea what it is about?
>> The cluster view in the UI shows all nodes connected.
>> 2016-04-14 19:45:29,310 INFO [Framework Task Thread Thread-2-SendThread(localhost:2181)]
org.apache.zookeeper.ClientCnxn Opening socket connection to server localhost/
Will not attempt to authenticate using SASL (unknown error)
>> 2016-04-14 19:45:29,313 WARN [Framework Task Thread Thread-2-SendThread(localhost:2181)]
org.apache.zookeeper.ClientCnxn Session 0x0 for server null, unexpected error, closing socket
connection and attempting reconnect
>> Connection refused
>> at Method) ~[na:1.8.0_45]
>> at ~[na:1.8.0_45]
>> at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(
>> at org.apache.zookeeper.ClientCnxn$ ~[na:na]
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