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https://issues.apache.org/jira/browse/YARN-8435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16525377#comment-16525377
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Giovanni Matteo Fumarola commented on YARN-8435:
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Thanks [~NeoMatrix] for the hard work, the tests are in better shape than in v2.
However, you added comments to the execution of the tests, not the javadoc.
Please add something like this.
e.g.
{code:java}
/**
* This test validate the correctness of creation of the pipeline for
RouterRmAdmin service in case....etc
*/
public void testRMAdminPipelineConcurrent() throws InterruptedException {
{code}
> NPE when the same client simultaneously contact for the first time Yarn Router
> ------------------------------------------------------------------------------
>
> Key: YARN-8435
> URL: https://issues.apache.org/jira/browse/YARN-8435
> Project: Hadoop YARN
> Issue Type: Bug
> Components: router
> Affects Versions: 2.9.0, 3.0.2
> Reporter: rangjiaheng
> Priority: Critical
> Attachments: YARN-8435.v1.patch, YARN-8435.v2.patch,
> YARN-8435.v3.patch, YARN-8435.v4.patch
>
>
> When Two client process (with the same user name and the same hostname) begin
> to connect to yarn router at the same time, to submit application, kill
> application, ... and so on, then a java.lang.NullPointerException may throws
> from yarn router.
>
>
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