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https://issues.apache.org/jira/browse/CRUNCH-16?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13418135#comment-13418135
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Rahul Sharma commented on CRUNCH-16:
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I can think of one more way of solving this. This dependency is being used in
PTYPEs class. We can refactor the piece that uses this code to a separate class.
There will be one more implementation of this piece without the dependency.
Both these will implementations will reside in separate src folders like
src/main/CDH3/java and src/main/CHD4above/java. The src folders will be enabled
on the profile that gets built. Hadoop1 will have this code and cdh3 version
will not.
> Fix dependency versions
> -----------------------
>
> Key: CRUNCH-16
> URL: https://issues.apache.org/jira/browse/CRUNCH-16
> Project: Crunch
> Issue Type: Task
> Reporter: Matthias Friedrich
> Priority: Critical
> Labels: maven
>
> Right now, the compile time classpath doesn't exactly match the runtime
> classpath. For example, Hadoop CDH3u4 comes with slf4j-api-1.4.3 while Crunch
> references slf4j-api-1.6.3. This could result in NoSuchMethodError and other
> nasty problems.
> We have to make sure that version numbers match (check "mvn dependency:tree")
> and that we don't ship artifacts that are already present on the runtime
> classpath. If our dependencies introduce incompatible transitive
> dependencies, we might have to downgrade them.
> Note: Maven's dependency resolution is order-dependent, see
> http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html
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