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https://issues.apache.org/jira/browse/FLINK-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135645#comment-14135645
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ASF GitHub Bot commented on FLINK-1097:
---------------------------------------
GitHub user tillrohrmann opened a pull request:
https://github.com/apache/incubator-flink/pull/121
[FLINK-1097] Fixed multiple slf4j bindings when using Hadoop2
I excluded all slf4j-log4j12 transitive dependencies to get rid off the
warning that slf4j finds multiple slf4j bindings in the classpath.
Additionally, I added log4j-over-slf4j and excluded all log4j transitive
dependencies so that slf4j handles also legacy log4j logging messages from
dependencies.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tillrohrmann/incubator-flink FLINK-1097
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-flink/pull/121.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #121
----
commit b9f76d59ecee99f058a9fa28021a2730bed6e43e
Author: Till Rohrmann <[email protected]>
Date: 2014-09-16T16:02:30Z
Excluded slf4j-log4j12 as transitive dependency in order to not have
multiple slf4j bindings in the class path. Added log4j-overslf4j and excluded
log4j transitive dependencies to collect log4j outputs.
----
> SLFJ warnings when running with Hadoop 2
> ----------------------------------------
>
> Key: FLINK-1097
> URL: https://issues.apache.org/jira/browse/FLINK-1097
> Project: Flink
> Issue Type: Improvement
> Components: Local Runtime
> Affects Versions: 0.7-incubating
> Reporter: Ufuk Celebi
> Priority: Minor
>
> I get this warning when running Flink with Hadoop 2 (I haven't tested Hadoop
> 1).
> {code}
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in
> [jar:file:.../flink-build/lib/flink-dist-0.7-incubating-SNAPSHOT-yarn-uberjar.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
> [jar:file:.../flink-build/lib/logback-classic-1.0.13.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
> [jar:file:.../flink-build/lib/slf4j-log4j12-1.7.5.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
> [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
> log4j:WARN No appenders could be found for logger
> (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
> log4j:WARN Please initialize the log4j system properly.
> log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more
> info.
> {code}
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