Erik Krogen updated HDFS-13265:
    Attachment: HDFS-13265.000.patch

> MiniDFSCluster should set reasonable defaults to reduce resource consumption
> ----------------------------------------------------------------------------
>                 Key: HDFS-13265
>                 URL: https://issues.apache.org/jira/browse/HDFS-13265
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, namenode, test
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Major
>         Attachments: HDFS-13265.000.patch, TestMiniDFSClusterThreads.java
> MiniDFSCluster takes its defaults from {{DFSConfigKeys}} defaults, but many 
> of these are not suitable for a unit test environment. For example, the 
> default handler thread count of 10 is definitely more than necessary for 
> (almost?) any unit test. We should set reasonable, lower defaults unless a 
> test specifically requires more.

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