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From "ChiaHung Lin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAMA-871) NPE when building core module due to gmaven-plugin.
Date Thu, 13 Feb 2014 06:32:21 GMT
ChiaHung Lin created HAMA-871:

             Summary: NPE when building core module due to gmaven-plugin. 
                 Key: HAMA-871
                 URL: https://issues.apache.org/jira/browse/HAMA-871
             Project: Hama
          Issue Type: Bug
          Components: bsp core
    Affects Versions: 0.7.0
         Environment: maven 3.0.5 (as described in https://wiki.apache.org/hama/GettingStarted)
Java version: 1.6.0_25
            Reporter: ChiaHung Lin
            Priority: Minor

When testing with a command `mvn -f core/pom.xml clean install -Dtest=<TestCase>`, maven
complains NPE as below
Caused by: java.lang.NullPointerException
	at java.util.Hashtable.put(Hashtable.java:394)
	at org.codehaus.groovy.maven.plugin.execute.GroovyMavenProjectAdapter$EvaluatingProperties.put(GroovyMavenProjectAdapter.java:162)
	at java.util.Properties.setProperty(Properties.java:143)
It looks like groovy-plugin raise the issue. 
But changing to v1.4 or other version, found at http://docs.codehaus.org/display/GMAVEN/Home,
shows that standard maven repository doesn't have those version.
Could not find artifact org.codehaus.groovy.maven:gmaven-plugin:pom:1.1 in central (http://repo.maven.apache.org/maven2)

This doesn't block the compilation actually, because compilation process can be done via `mvn
clean install` without a problem. 

BTW, it seems that gmaven is discontinued. 
GMaven provides integration of Groovy into Maven. This project has been discontinued since
the structure doesn't work well with how Groovy's invokedynamic releases.

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