Rajeshbabu Chintaguntla created HBASE-27635:
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             Summary: Shutdown zookeeper logs coming via ReadOnlyZKClient when 
hbase shell started
                 Key: HBASE-27635
                 URL: https://issues.apache.org/jira/browse/HBASE-27635
             Project: HBase
          Issue Type: Improvement
          Components: shell
            Reporter: Rajeshbabu Chintaguntla
            Assignee: Rajeshbabu Chintaguntla
             Fix For: 2.6.0, 3.0.0-alpha-4, 2.5.4


When hbase shell with HBase 2.5.2 started there is too much logging of zk 
connection realated, classpaths etc.  Even though we enabled ERROR log level 
for zookeeper package.

{noformat}

2023-02-10 17:34:25,211 INFO  
[ReadOnlyZKClient-host1:2181,host2:2181,host3:2181@0x15c16f19] 
zookeeper.ZooKeeper: Client 
environment:zookeeper.version=3.5.9-5-a433770fc7b303332f10174221799495a26bbca2, 
built on 02/07/2023 13:02 GMT
2023-02-10 17:34:25,212 INFO  
[ReadOnlyZKClient-host1:2181,host2:2181,host3:2181@0x15c16f19] 
zookeeper.ZooKeeper: Client environment:host.name=host1
2023-02-10 17:34:25,212 INFO  
[ReadOnlyZKClient-host1:2181,host2:2181,host3:2181:2181@0x15c16f19] 
zookeeper.ZooKeeper: Client environment:java.version=1.8.0_352
2023-02-10 17:34:25,212 INFO  
[ReadOnlyZKClient-host1:2181,host2:2181,host3:2181@0x15c16f19] 
zookeeper.ZooKeeper: Client environment:java.vendor=Red Hat, Inc.
2023-02-10 17:34:25,212 INFO  
[ReadOnlyZKClient-host1:2181,host2:2181,host3:2181@0x15c16f19] 
zookeeper.ZooKeeper: Client 
environment:java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.352.b08-2.el7_9.x86_64/jre

{noformat}

Same way better to change the  org.apache.hadoop.hbase.zookeeper package log 
level to error.
{noformat}

# Set logging level to avoid verboseness
org.apache.logging.log4j.core.config.Configurator.setAllLevels('org.apache.zookeeper',
 log_level)
org.apache.logging.log4j.core.config.Configurator.setAllLevels('org.apache.hadoop',
 log_level)

org.apache.logging.log4j.core.config.Configurator.setAllLevels('org.apache.hadoop.hbase.zookeeper',
 log_level)

{noformat}



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