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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12028) Ozone: CLI: remove noisy slf4j binding output from hdfs oz command.
Date Fri, 23 Jun 2017 22:33:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16061597#comment-16061597
] 

Chen Liang commented on HDFS-12028:
-----------------------------------

Thanks [~xyao] for filing this! I did some initial investigation by looking into output of
"mvn dependency:tree". I think this is caused by jscsi adding this {{logback-classic-1.0.10.jar}}
to its dependency. To resolve this I think we need to add {{<exclusion>...</exclusion>}}
to certain pom files, I haven't looked into which and where exactly to add though.

> Ozone: CLI: remove noisy slf4j binding output from hdfs oz command.
> -------------------------------------------------------------------
>
>                 Key: HDFS-12028
>                 URL: https://issues.apache.org/jira/browse/HDFS-12028
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Xiaoyu Yao
>
> Currently when you run CLI "hdfs oz ...", there always a noisy slf4j biding issue log
output. This ticket is opened to removed it. 
> {code}
> xyao$ hdfs oz
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in [jar:file:/Users/xyao/deploy/ozone/hadoop-3.0.0-alpha4-SNAPSHOT/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in [jar:file:/Users/xyao/deploy/ozone/hadoop-3.0.0-alpha4-SNAPSHOT/share/hadoop/hdfs/lib/logback-classic-1.0.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
> SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
> {code}



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