[
https://issues.apache.org/jira/browse/HADOOP-7506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078839#comment-13078839
]
Alejandro Abdelnur commented on HADOOP-7506:
--------------------------------------------
Note Maven warning on this:
{code}
[WARNING] Some problems were encountered while building the effective model for
org.apache.hadoop:hadoop-project:pom:0.23.0-SNAPSHOST
[WARNING] 'version' contains an expression but should be a constant. @
org.apache.hadoop:hadoop-project:${hadoop.version},
/Users/tucu/src/apache/hadoop/utrunk/hadoop-project/pom.xml, line 19, column 12
{code}
In addition, this won't work (I've tried this approach a couple of years ago
when starting with Oozie) for the following reason:
The installed/deployed POMs will have a variable as the version and Maven
dependency resolution won't be able to resolve that variable to a concrete
value. Following there is a minimal POM that fails after doing a 'mvn install'
with the HADOOP-7506 patch. (Make sure you trash other snapshots of hadoop-*
and you are using -offline, to force the use of the just installed artifacts).
{code}
<?xml version="1.0" encoding="UTF-8"?>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>x</groupId>
<artifactId>x</artifactId>
<version>1</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>0.23.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
{code}
One of the reasons for the failure is that the version is defined in
hadoop-common's parent POM (hadoop-project) and then Maven cannot determine the
version of hadoop-project to use because (chicken & egg problem).
The Maven way to take care of version upgrades through out the POMs is using
the maven-release-plugin (I've used it in the past and it works quite well in
multi-module projects)
> hadoopcommon build version cant be set from the maven commandline
> -----------------------------------------------------------------
>
> Key: HADOOP-7506
> URL: https://issues.apache.org/jira/browse/HADOOP-7506
> Project: Hadoop Common
> Issue Type: Bug
> Components: build
> Affects Versions: 0.23.0
> Reporter: Giridharan Kesavan
> Assignee: Giridharan Kesavan
> Attachments: HADOOP-7506.PATCH
>
>
> pom.xml had to introduce hadoop.version property with the default value set
> to the snapshot version. If someone during build time want to override the
> version from maven command line they can do so by passing
> -Dhadoop.version="". For ppl who doesnt want to change the default version
> can continue building.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
