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https://issues.apache.org/jira/browse/HDFS-15731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17270873#comment-17270873
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Akira Ajisaka commented on HDFS-15731:
--------------------------------------

Reduced the thread count from 4 to 2 in trunk, branch-3.3, branch-3.2, and 
branch-3.1.

> Reduce threadCount for unit tests to reduce the memory usage
> ------------------------------------------------------------
>
>                 Key: HDFS-15731
>                 URL: https://issues.apache.org/jira/browse/HDFS-15731
>             Project: Hadoop HDFS
>          Issue Type: Task
>          Components: build, test
>            Reporter: Akira Ajisaka
>            Assignee: Akira Ajisaka
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.3.1, 3.4.0, 3.1.5, 3.2.3
>
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> Recently there are many OOM errors in HDFS unit tests. I want to reduce 
> memory usages by reducing the number of unit tests run in parallel.



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