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https://issues.jboss.org/browse/WELD-1109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12685171#comment-12685171
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Ales Justin commented on WELD-1109:
-----------------------------------
You've already got weld-servlet-core, which is bare Weld servlet int bins.
Then you're on your own to include its deps.
So I don't see why slf4j should get a special treatment.
> weld-servlet.jar should NOT contain slf4j (still found in 2.0.0.Alpha1)
> -----------------------------------------------------------------------
>
> Key: WELD-1109
> URL: https://issues.jboss.org/browse/WELD-1109
> Project: Weld
> Issue Type: Bug
> Components: Weld SPI
> Affects Versions: 2.0.0.Alpha1
> Environment: WELD-845
> Reporter: Andrew Hughes
> Priority: Critical
> Labels: slf4j
> Original Estimate: 4 hours
> Remaining Estimate: 4 hours
>
> NOTE: This is intentionally a duplicate of WELD-845 (because I believe you
> should fix this in BOTH 1.1.7+ and 2.0.0).
> Please fix this in v2.0.0, v1.1.x is something others might care to comment
> on...
> Inheriting weld-servlet-2.0.0.Alpha1.jar or earlier (as a dependency) should
> not include the org.slf4j.** classes. Because it precludes the consuming
> project from (easily) selecting which slf4j binding they want to use. I
> recognise that it is "convenient" to include these classes because they are
> quite common in use and maybe also quite necessary for weld. However, it's
> very likely to raise slf4j binding collisions
> (http://www.slf4j.org/codes.html#multiple_bindings). Especially with other
> 3rd party dependencies having their own slf4j dependencies. It's also likely
> that this will affect future projects more so than current projects (i.e.
> this problem wont simply 'go away'). What would happen if every jar did
> this???? What if the JRE did this????
> Please remove these classes from the artifact, and please include them in the
> maven pom.xml as dependencies (this allows an easy <exclusion> for maven
> users to fix the slf4j collision).
> Warning (using 1.1.7, but 2.0.0.Alpha contains the same classes):
> {{
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in
> [jar:file:/C:/dev/workspace/workspace3.7/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/acme-project/WEB-INF/lib/slf4j-jdk14-1.6.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
> [jar:file:/C:/dev/workspace/workspace3.7/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/acme-project/WEB-INF/lib/weld-servlet-1.1.7.Final.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
> explanation.
> }}
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