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From Jan Thomä (JIRA) <j...@apache.org>
Subject [jira] [Created] (FLINK-2975) Exclude logging dependencies from shaded Hadoop jar.
Date Thu, 05 Nov 2015 11:00:30 GMT
Jan Thomä created FLINK-2975:
--------------------------------

             Summary: Exclude logging dependencies from shaded Hadoop jar.
                 Key: FLINK-2975
                 URL: https://issues.apache.org/jira/browse/FLINK-2975
             Project: Flink
          Issue Type: Improvement
    Affects Versions: 0.9.1
            Reporter: Jan Thomä


The shaded hadoop jar has Log4j included. Therefore when you try to use flink with logback/slf4j
logging you will get warnings like:

```
log4j:WARN No appenders could be found for logger (kafka.consumer.SimpleConsumer).
log4j:WARN Please initialize the log4j system properly.
```
even when you have the appropriate slf4j bridges in the classpath. I'd suggest to exclude
the Log4j dependency from the shaded Hadoop jar and then let the end user decide on wether
he wants to add log4j or a slf4j bridge to the classpath.



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