[HADOOP-8278] Make sure components declare correct set of dependencies

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.2-alpha
• Component/s: build
• Hadoop Flags: Reviewed
• Assignee: Thomas White
• Reporter: Thomas White
• Created: 13/Apr/12 23:48
• Updated: 20/May/16 03:36
• Resolved: 15/Aug/12 19:29

Description

As mentioned by Scott Carey in https://issues.apache.org/jira/browse/MAPREDUCE-3378?focusedCommentId=13173437&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13173437, we need to make sure that components are declaring the correct set of dependencies. In current trunk there are errors of omission and commission (as reported by 'mvn dependency:analyze'):

• "Used undeclared dependencies" - these are dependencies that are being met transitively. They should be added explicitly as "compile" or "provided" scope.
• "Unused declared dependencies" - these are dependencies that are not needed for compilation, although they may be needed at runtime. They certainly should not be "compile" scope - they should either be removed or marked as "runtime" or "test" scope.

Issue Links

• relates to: HADOOP-7161 Remove unnecessary oro package from dependency management section
• relates to: HADOOP-12893 Verify LICENSE.txt and NOTICE.txt
• relates to: HADOOP-8762 Mark container-provided dependencies with 'provided' scope
• relates to: MAPREDUCE-4632 Make sure MapReduce declares correct set of dependencies
• relates to: YARN-81 Make sure YARN declares correct set of dependencies
• relates to: MAPREDUCE-3378 Create a single 'hadoop-mapreduce' Maven artifact