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https://issues.apache.org/jira/browse/HAMA-871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13903033#comment-13903033
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ChiaHung Lin commented on HAMA-871:
-----------------------------------
Please feel free to commit this patch.
> 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
> Attachments: HAMA-871.patch
>
>
> When testing with a command `mvn -f core/pom.xml clean install
> -Dtest=<TestCase>`, maven complains NPE as below
> {code}
> 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)
> {code}
> It looks like groovy-plugin raise the issue.
> {code}
> <groupId>org.codehaus.groovy.maven</groupId>
> <artifactId>gmaven-plugin</artifactId>
> <version>1.0</version>
> {code}
> 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.
> {code}
> Could not find artifact org.codehaus.groovy.maven:gmaven-plugin:pom:1.1 in
> central (http://repo.maven.apache.org/maven2)
> {code}
> 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.
> {code}
> 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.
> {code}
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