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https://issues.apache.org/jira/browse/HADOOP-9991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13783152#comment-13783152
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Steve Loughran commented on HADOOP-9991:
----------------------------------------
enforcement is on, it's more excessive export to things downstream, especially
with hbase in the mix -as that is where version number problems start to surface
This is the main set of "exclusions because they don't appear used" values,
though HDFS's JSP pages may well need jasper. The
jersey-test-framework-grizzly2 dependency (branch-2.1.1) is clearly spurious
{code}
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-minicluster</artifactId>
<version>${hadoop.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>com.sun.jersey.jersey-test-framework</groupId>
<artifactId>jersey-test-framework-grizzly2</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>${hadoop.version}</version>
<exclusions>
<exclusion>
<groupId>tomcat</groupId>
<artifactId>jasper-runtime</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-yarn-server-common</artifactId>
<version>${hadoop.version}</version>
<exclusions>
<exclusion>
<groupId>com.sun.jersey.jersey-test-framework</groupId>
<artifactId>jersey-test-framework-grizzly2</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-yarn-client</artifactId>
<version>${hadoop.version}</version>
<exclusions>
<exclusion>
<groupId>com.sun.jersey.jersey-test-framework</groupId>
<artifactId>jersey-test-framework-grizzly2</artifactId>
</exclusion>
</exclusions>
</dependency>
{code}
> Fix up Hadoop Poms for enforced dependencies, roll up JARs to latest versions
> -----------------------------------------------------------------------------
>
> Key: HADOOP-9991
> URL: https://issues.apache.org/jira/browse/HADOOP-9991
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build
> Affects Versions: 2.3.0, 2.1.1-beta
> Reporter: Steve Loughran
>
> If you try using Hadoop downstream with a classpath shared with HBase and
> Accumulo, you soon discover how messy the dependencies are.
> Hadoop's side of this problem is
> # not being up to date with some of the external releases of common JARs
> # not locking down/excluding inconsistent versions of artifacts provided down
> the dependency graph
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