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https://issues.apache.org/jira/browse/YARN-10490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17266356#comment-17266356
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Szilard Nemeth commented on YARN-10490:
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Hi [~akshink],
Thanks for working on this.
I'm a bit confused.
Looking at the source code of TopCLI, there's a method named "clearScreen":
https://github.com/apache/hadoop/blob/630f8ddd2c72c27b02032ed3cf9dde15745ed605/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/TopCLI.java#L473
It's implementation prints the CLEAR string from this class to the System.out
stream.
You introduced a string called CLEAR_SCREEN.
So the namings are quite confusing.
Did you test to call the clearScreen method from the shutdown hook?
If not, please test it and you don't need the new constant.
Thanks.
> "yarn top" command not quitting completely with ctrl+c
> ------------------------------------------------------
>
> Key: YARN-10490
> URL: https://issues.apache.org/jira/browse/YARN-10490
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn
> Reporter: Agshin Kazimli
> Assignee: Agshin Kazimli
> Priority: Minor
> Attachments: YARN-10490-001.patch, YARN-10490-001.patch,
> YARN-10490-002.patch
>
>
> When we quit "yarn top" command using ctrl+c, even though the command prompt
> returns, the old statistics info is still visible below the prompt.
> And we need to manually type clear command or multiple return keys to get
> around it. It is reported as a inconvenience for the customer from a
> usability perspective.
>
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