to follow up with an example,
JIRA on updating dependencies and tuning the POMshttps://issues.apache.org/jira/browse/HADOOP-9991
here's a JIRA on dropping ZK from the hadoop-client POMhttps://issues.apache.org/jira/browse/HADOOP-9905
And there's an mr-client POM where we've been slowly cutting down on what
it pulls inhttps://issues.apache.org/jira/browse/MAPREDUCE-5624
This shows that
1. we can given maven/ivy projects what they need -and no more- through
2. its an ongoing project to keep those dependencies cut down.
3. there's always the risk that you drop too much and some project
discovers that while their code builds, it doesn't run any more.
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