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http://jira.codehaus.org/browse/MSHARED-191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=261787#action_261787
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Joerg Schaible commented on MSHARED-191:
----------------------------------------

At least there is a workaround: 
http://article.gmane.org/gmane.comp.jakarta.commons.devel/113911

> Specification-Version must not contain "-SNAPSHOT"
> --------------------------------------------------
>
>                 Key: MSHARED-191
>                 URL: http://jira.codehaus.org/browse/MSHARED-191
>             Project: Maven Shared Components
>          Issue Type: Bug
>          Components: maven-archiver
>    Affects Versions: maven-archiver-2.4.1
>         Environment: Ubuntu 10.10, Maven 2.2.1 and Maven 3.0.3, OpenJDK 
> Runtime Environment (IcedTea6 1.9.7) (6b20-1.9.7-0ubuntu1) (64 bits)
>            Reporter: Romain Buquet
>         Attachments: patch maven-archiver
>
>
> When building an artifact with a SNAPSHOT version,
> Specification-Version and Implementation-Version are both set to 
> ${pom.version} (as described in the documentation).
> But this will break the deployment in a container like WebLogic Server 10.3.4.
> This behavior is compliant with specification
> http://download.oracle.com/javase/6/docs/technotes/guides/versioning/spec/versioning2.html#wp89939
> where it is said that "Specification version numbers use a Dewey decimal 
> notation consisting of numbers seperated by periods"
> Further in this spec, in ยง "1.5.10 Rationale for limiting Implementation 
> version numbers to identity", it is explained why Implementation-Version need 
> to be compared strictly for equality.
> So we can understand that:
> - Specification-Version must NOT have "-SNAPSHOT" suffix. This is legal to 
> keep only the beginning of ${pom.version}, because it represents the spec 
> version, not the build ;
> - Implementation-Version has to be set to ${pom.version} to represent the 
> exact version of the build.
> This used to be the behavior in Maven 1:
> http://maven.apache.org/maven-1.x/plugins/jar/manifest.html

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