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https://issues.apache.org/jira/browse/HADOOP-16530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916391#comment-16916391
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Masatake Iwasaki commented on HADOOP-16530:
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Interestingly unit tests of hadoop-common are using different implementationof
{{javax.xml.parsers.\*}}. hadoop-common uses
{{com.sun.org.apache.xerces.internal.jaxp.\*}} while hadoop-hdfs (and projects
depending on it) uses {{org.apache.xerces.jaxp.*}} based on its dependency on
xercesImpl.
I ran TestConfiguration and TestConfServlet after maually adding dependency on
xercesImpl 2.12.0 in hadoop-common/pom.xml. found no problems.
> Update xercesImpl in branch-2
> -----------------------------
>
> Key: HADOOP-16530
> URL: https://issues.apache.org/jira/browse/HADOOP-16530
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Major
> Labels: release-blocker
> Attachments: HADOOP-16530.branch-2.001.patch
>
>
> Hadoop 2 depends on xercesImpl 2.9.1, which is more than 10 years old. The
> latest version is 2.12.0, released last year Let's update this dependency.
> HDFS-12221 removed xercesImpl in Hadoop 3. Looking at HDFS-12221, the impact
> of this dependency is very minimal: only used by offlineimageviewer.
> TestOfflineEditsViewer passed for me after the update. Not sure about the
> impact of downstream applications though.
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