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