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https://issues.apache.org/jira/browse/HADOOP-14693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16695934#comment-16695934
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Steve Loughran commented on HADOOP-14693:
-----------------------------------------


Global timeout control is a critical part of long-lived tests: we want to stop 
jenkins runs hanging. I put a lot of work into the S3A scale tests to make 
those timeouts configurable from the CLI, so a 4GB test run could have a longer 
timeout than a 32MB dataset, and {{org.apache.hadoop.test.HadoopTestBase}} 
tries to provide the same for all its subclasses.

Looking at the github issue, it looks like we just need to write and ship with 
our own timing extension, which we can sneak into hadoop-common test for all 
our tests to pick up

> Upgrade JUnit from 4 to 5
> -------------------------
>
>                 Key: HADOOP-14693
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14693
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Akira Ajisaka
>            Priority: Major
>
> JUnit 4 does not support Java 9. We need to upgrade this.



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