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https://issues.apache.org/jira/browse/MAHOUT-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834915#comment-13834915
]
Suneel Marthi commented on MAHOUT-1350:
---------------------------------------
[~mobiusinversion] This is not specifically an issue with Mahout per se, but
is a combination of using Hadoop + Spring.
What you are seeing has been reported elsewhere at
http://stackoverflow.com/questions/18690582/how-to-create-jetty-spring-app-with-hbase-connection.
Hadoop comes with commons-collections-3.2.1.jar and
commons-beanutils-1.7.1.jar, while Spring 3 is bundled with
commons-beanutils-1.8.0.jar; hence the jar conflict at runtime.
Not sure if there's anything that can be fixed in Mahout (since both Hadoop and
Spring 3.x are 3rd party libraries as far as Mahout is concerned).
With your permission, I would like to close this JIRA as 'Not a Problem'.
> Bean Utils JarClassLoader Warnings
> ----------------------------------
>
> Key: MAHOUT-1350
> URL: https://issues.apache.org/jira/browse/MAHOUT-1350
> Project: Mahout
> Issue Type: Bug
> Reporter: David Williams
> Priority: Minor
>
> Hi all,
> I am trying to embed a user based recommender in a web service using embedded
> jetty, and spring 3. However, including the mahout libraries leads to this
> collision. It means I CANNOT use Mahout in its current implementation.
> {code}
> JarClassLoader: Warning: org/apache/commons/collections/FastHashMap.class in
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> lib/commons-beanutils-1.7.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
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> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
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> in lib/commons-beanutils-1.7.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
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> lib/commons-collections-3.2.1.jar (with different bytecode)
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> JarClassLoader: Warning: org/apache/commons/beanutils/PropertyUtilsBean.class
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> JarClassLoader: Warning:
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> JarClassLoader: Warning: org/apache/commons/collections/ArrayStack.class in
> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning: org/apache/commons/collections/Buffer.class in
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> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
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> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning: org/apache/commons/collections/FastHashMap$1.class
> in lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
> org/apache/commons/collections/FastHashMap$CollectionView$CollectionViewIterator.class
> in lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
> org/apache/commons/collections/FastHashMap$CollectionView.class in
> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
> org/apache/commons/collections/FastHashMap$EntrySet.class in
> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
> org/apache/commons/collections/FastHashMap$KeySet.class in
> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning:
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> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> JarClassLoader: Warning: org/apache/commons/collections/FastHashMap.class in
> lib/commons-beanutils-core-1.8.0.jar is hidden by
> lib/commons-collections-3.2.1.jar (with different bytecode)
> {code}
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