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https://issues.apache.org/jira/browse/HBASE-21453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16709950#comment-16709950
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Peter Somogyi commented on HBASE-21453:
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[~jatsakthi] Can you do something to change log level for other Zookeeper
related logs as well? From the above example this patch will remove the first
log message.
> Convert ReadOnlyZKClient to DEBUG instead of INFO
> -------------------------------------------------
>
> Key: HBASE-21453
> URL: https://issues.apache.org/jira/browse/HBASE-21453
> Project: HBase
> Issue Type: Bug
> Components: logging, Zookeeper
> Reporter: stack
> Assignee: Sakthi
> Priority: Major
> Attachments: hbase-21453.master.001.patch
>
>
> Running commands in spark-shell, this is what it looks like on each
> invocation:
> {code}
> scala> val count = rdd.count()
> 2018-11-07 21:01:46,026 INFO [Executor task launch worker for task 1]
> zookeeper.ReadOnlyZKClient: Connect 0x18f3d868 to localhost:2181 with session
> timeout=90000ms, retries 30, retry interval 1000ms, keepAlive=60000ms
> 2018-11-07 21:01:46,027 INFO [ReadOnlyZKClient-localhost:2181@0x18f3d868]
> zookeeper.ZooKeeper: Initiating client connection,
> connectString=localhost:2181 sessionTimeout=90000
> watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$20/1362339879@743dab9f
> 2018-11-07 21:01:46,030 INFO
> [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)]
> zookeeper.ClientCnxn: Opening socket connection to server
> localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL
> (unknown error)
> 2018-11-07 21:01:46,031 INFO
> [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)]
> zookeeper.ClientCnxn: Socket connection established to
> localhost/127.0.0.1:2181, initiating session
> 2018-11-07 21:01:46,033 INFO
> [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)]
> zookeeper.ClientCnxn: Session establishment complete on server
> localhost/127.0.0.1:2181, sessionid = 0x166f1b283080005, negotiated timeout =
> 40000
> 2018-11-07 21:01:46,035 INFO [Executor task launch worker for task 1]
> mapreduce.TableInputFormatBase: Input split length: 0 bytes.
> [Stage 1:> (0 + 1) /
> 1]2018-11-07 21:01:48,074 INFO [Executor task launch worker for task 1]
> zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x18f3d868 to
> localhost:2181
> 2018-11-07 21:01:48,075 INFO [ReadOnlyZKClient-localhost:2181@0x18f3d868]
> zookeeper.ZooKeeper: Session: 0x166f1b283080005 closed
> 2018-11-07 21:01:48,076 INFO [ReadOnlyZKClient
> -localhost:2181@0x18f3d868-EventThread] zookeeper.ClientCnxn: EventThread
> shut down for session: 0x166f1b283080005
> count: Long = 10
> {code}
> Let me shut down the ReadOnlyZKClient log level.
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