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https://issues.apache.org/jira/browse/TEZ-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16645328#comment-16645328
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Jonathan Eagles commented on TEZ-3961:
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[~kshukla], can you address the ASF license warnings?
> Tez UI web.xml tries to reach out to java.sun.com for validation after moving
> to jetty-9
> ----------------------------------------------------------------------------------------
>
> Key: TEZ-3961
> URL: https://issues.apache.org/jira/browse/TEZ-3961
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.9.1
> Reporter: Kuhu Shukla
> Assignee: Kuhu Shukla
> Priority: Major
> Attachments: TEZ-3961.001.patch
>
>
> Tez UI can throw a 503 error when hosted on a server that cannot reach public
> IPs like java.sun.com which are listed as servers for DTDs in web.xml. This
> behavior change comes from moving to jetty 9 (Tez and Hadoop 3.0) which
> removed provided schemas that were being shipped with earlier versions. It is
> suboptimal even in cases where public IPs are accessible to fetch the DTD for
> a very very simple web.xml file. We can choose to either remove the DTD
> validation or add dependency explicitly to org.eclipse.jetty.toolchain ยป
> jetty-osgi-servlet-api to allow for this jetty change to not affect the
> behavior of tez-ui.
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