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https://issues.apache.org/jira/browse/MAPREDUCE-5878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13994090#comment-13994090
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Sangjin Lee commented on MAPREDUCE-5878:
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This could in theory cause issues in areas such as jaxb.
> some standard JDK APIs are not part of system classes defaults
> --------------------------------------------------------------
>
> Key: MAPREDUCE-5878
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5878
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.4.0
> Reporter: Sangjin Lee
> Assignee: Sangjin Lee
>
> There are some standard JDK APIs that are not part of the
> mapreduce.job.classloader.system.classes property value.
> Currently the default value covers only "java.,javax." from the JDK. However,
> there are other APIs that are as well-established as these, such as
> org.w3c.dom and org.xml.sax. In other similar systems (e.g. OSGi), it is a
> standard practice to include both of these packages in the system classes. We
> should add these to the default values.
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