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https://issues.apache.org/jira/browse/HBASE-17007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15633961#comment-15633961
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stack commented on HBASE-17007:
-------------------------------

We are referring to the dup log of environment and classpath all at INFO level.

Four lines each time it makes a connection:

487532 2016-11-01 23:06:35,577 INFO  
[regionserver/ve0528.halxg.cloudera.com/10.17.240.22:16020] 
zookeeper.ZooKeeper: Initiating client connection, 
connectString=ve0524.halxg.cloudera.com:2222 sessionTimeout=90000 
watcher=org.apache.hadoo       p.hbase.zookeeper.PendingWatcher@76ae1cc9
487533 2016-11-01 23:06:35,578 INFO  
[regionserver/ve0528.halxg.cloudera.com/10.17.240.22:16020-SendThread(ve0524.halxg.cloudera.com:2222)]
 zookeeper.ClientCnxn: Opening socket connection to server 
ve0524.halxg.cloudera.com/10.17.240.20:2       222. Will not attempt to 
authenticate using SASL (unknown error)
487534 2016-11-01 23:06:35,578 INFO  
[regionserver/ve0528.halxg.cloudera.com/10.17.240.22:16020-SendThread(ve0524.halxg.cloudera.com:2222)]
 zookeeper.ClientCnxn: Socket connection established to 
ve0524.halxg.cloudera.com/10.17.240.20:2222       , initiating session
487535 2016-11-01 23:06:35,587 INFO  
[regionserver/ve0528.halxg.cloudera.com/10.17.240.22:16020-SendThread(ve0524.halxg.cloudera.com:2222)]
 zookeeper.ClientCnxn: Session establishment complete on server 
ve0524.halxg.cloudera.com/10.17.240       .20:2222, sessionid = 
0x15823a5618b0018, negotiated timeout = 90000


In particular, a new user starting up a standalone instance gets 200 lines of 
logs just on startup of which > 10% are zk for the most part duplicating what 
we've already said. Doesn't look the best.

> Move ZooKeeper logging to its own log file
> ------------------------------------------
>
>                 Key: HBASE-17007
>                 URL: https://issues.apache.org/jira/browse/HBASE-17007
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>            Reporter: Esteban Gutierrez
>            Assignee: Esteban Gutierrez
>            Priority: Trivial
>         Attachments: 
> 0001-HBASE-17007-Move-ZooKeeper-logging-to-its-own-log-fi.patch
>
>
> ZooKeeper logging can be too verbose. Lets move ZooKeeper logging to a 
> different log file.



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