Add the following JVM argument to the server processes:

-Dzookeeper.sasl.client=false

> On April 17, 2017 at 4:01 PM "Brown, Scott M [US] (MS)" 
> <scott.bro...@ngc.com> wrote:
> 
> 
>     We are getting this ~ every second in logs.. Apps appear up and working, 
> and we’d rather have INFO and WARN on for the time being, but is there any 
> way to disable this, or resolve? 
> 
>      
> 
>     2017-04-17 13:47:49,490 
> [paxweb-extender-2-thread-1-SendThread(FQDN:2181)] INFO  
> org.apache.zookeeper.ClientCnxn :: Opening socket connection to server 
> FQDN/HOST IP ADDR:2181. Will not attempt to authenticate using SASL (unknown 
> error)
> 
>     2017-04-17 13:47:49,490 
> [paxweb-extender-2-thread-1-SendThread(FQDN:2181)] INFO  
> org.apache.zookeeper.ClientCnxn :: Socket connection established to FQDN/HOST 
> IP ADDR:2181, initiating session
> 
>     2017-04-17 13:47:49,491 
> [paxweb-extender-2-thread-1-SendThread(FQDN:2181)] INFO  
> org.apache.zookeeper.ClientCnxn :: Session establishment complete on server 
> FQDN/HOST IP ADDR:2181, sessionid = 0x15b7ba86254004a, negotiated timeout = 
> 6000
> 
>     2017-04-17 13:47:49,491 [paxweb-extender-2-thread-1-EventThread] INFO  
> org.I0Itec.zkclient.ZkClient :: zookeeper state changed (SyncConnected)
> 
>     2017-04-17 13:47:49,492 
> [paxweb-extender-2-thread-1-SendThread(FQDN:2181)] WARN  
> org.apache.zookeeper.ClientCnxn :: Session 0x15b7ba86254004a for server 
> FQDN/HOST IP ADDR:2181, unexpected error, closing socket connection and 
> attempting reconnect
> 
>     java.lang.NoClassDefFoundError: org/apache/zookeeper/proto/WatcherEvent
> 
>             at 
> org.apache.zookeeper.ClientCnxn$SendThread.readResponse(ClientCnxn.java:744)
> 
>             at 
> org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:94)
> 
>             at 
> org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:366)
> 
>             at 
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
> 
>     2017-04-17 13:47:49,593 [paxweb-extender-2-thread-1-EventThread] INFO  
> org.I0Itec.zkclient.ZkClient :: zookeeper state changed (Disconnected)
> 
>      
> 

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