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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13300) maven-jar-plugin executions break build with newer plugin
Date Mon, 20 Jun 2016 22:37:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15340570#comment-15340570

Christopher Tubbs commented on HADOOP-13300:

In some of the cases, it looks like the main jar artifact is being created earlier in the
build lifecycle so it is available for tests. In these cases, it might be acceptable to override
(or skip) the default execution of the maven-jar-plugin, but it's probably better to omit
the custom execution, and instead move the tests to the integration-test phases, which exists
for this purpose.

> maven-jar-plugin executions break build with newer plugin
> ---------------------------------------------------------
>                 Key: HADOOP-13300
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13300
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: build
>            Reporter: Christopher Tubbs
> Several places throughout the Hadoop build (going back at least as far as 2.4.1; I didn't
check earlier), extra executions of maven-jar-plugin have been used to create jars at different
phases in the build lifecycle.
> These have typically not specified an execution id, but should have specified "default-jar"
to override the default execution of maven-jar-plugin. They have worked in the past because
maven-jar-plugin didn't check to verify if an artifact was built/attached multiple times (without
using a classifier), but will not work when a newer version of maven-jar-plugin is used (>3.0),
which is more strict about checking.
> This is a problem for any downstream packagers which are using newer versions of build
plugins (due to dependency convergence) and will become a problem when Hadoop moves to a newer
version of the jar plugin (with ASF Parent POM 18, for example).
> [These are the ones I've found|https://lists.apache.org/thread.html/2c9d9ea5448a3ed22743916d20e40a9e589bfa383c8ea65f35cb3f0d@%3Cuser.hadoop.apache.org%3E].

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