[forge-issues] [JBoss JIRA] (FORGE-2531) Using mixed versions of slf4j causes SLF4J to print to console a WARN about this

[George Gastaldi (JIRA)]

    [ https://issues.jboss.org/browse/FORGE-2531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143766#comment-13143766 ] 

George Gastaldi commented on FORGE-2531:
----------------------------------------

[~davsclaus], you need to change the fabric8 addon to depend on the new slf4j addon.  Make sure to exclude every SLF4J reference in your addon as the API and the impl will be provided by this addon.  
{code:xml}
      <dependency>
         <groupId>org.jboss.forge.addon</groupId>
         <artifactId>slf4j</artifactId>
         <version>1.7.13</version>
         <classifier>forge-addon</classifier>
      </dependency>      
{code} 

> Using mixed versions of slf4j causes SLF4J to print to console a WARN about this
> --------------------------------------------------------------------------------
>
>                 Key: FORGE-2531
>                 URL: https://issues.jboss.org/browse/FORGE-2531
>             Project: Forge
>          Issue Type: Bug
>    Affects Versions: 2.20.1.Final
>            Reporter: Claus Ibsen
>            Priority: Minor
>             Fix For: 3.x Future
>
>
> You can reproduce by installing the fabric8 devops addon
> {code}
> addon-install --coordinate io.fabric8.forge:devops,2.2.63
> ***SUCCESS*** Addon io.fabric8.forge:devops,2.2.63 was installed successfully.
> [forge-distribution-2.20.1.Final]$ deSLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in [jar:file:/opt/forge-distribution-2.20.1.Final/addons/org-jboss-forge-addon-maven-2-20-1-Final/slf4j-jdk14-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in [jar:file:/opt/forge-distribution-2.20.1.Final/addons/org-jboss-forge-addon-database-tools-2-20-1-Final/slf4j-jdk14-1.5.8.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.JDK14LoggerFactory]
> {code}
> And then wait some seconds then you see all the slf4j logging. As you can see those 2 addons from forge itself are using mixed slf4j versions.
> 1.7.5 and 1.5.8



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