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From "Praveen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5858) When HBase gets executed against Hadoop 2.X "SLF4j:CLASSPATH contains multiple SLF4j binding" warning is displayed
Date Tue, 24 Apr 2012 03:46:41 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Praveen updated HBASE-5858:
---------------------------

    Attachment: error.JPG
    
> When HBase gets executed against Hadoop 2.X "SLF4j:CLASSPATH contains multiple SLF4j
binding" warning is displayed
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-5858
>                 URL: https://issues.apache.org/jira/browse/HBASE-5858
>             Project: HBase
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 0.92.0, 0.92.1
>            Reporter: Roman Shaposhnik
>            Assignee: Roman Shaposhnik
>            Priority: Minor
>         Attachments: error.JPG
>
>
> Since HBase tries to find locations of the Hadoop jars from the environment in certain
cases it ends up with extra SLF4j jars coming from Hadoop classpath. When that happens "SLF4j:CLASSPATH
contains multiple SLF4j binding" warning gets displayed.
> The good news here is that the warning is just that -- a warning. The bad news is that
it seems this issue will be tricky to fix properly. On one hand we would like Hadoop itself
to give us transitive closure of the set of jar files required (computing that in the HBase
script is a maintenance nightmare). On the other hand that set of jar files could contain
some of the very same jars shipped with HBase.
> This problem existed for quiet some time. SLF4j is just the first component to complain.

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