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https://issues.apache.org/jira/browse/HDFS-11683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15975414#comment-15975414
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Andrew Wang commented on HDFS-11683:
------------------------------------

I think an InvalidRequestException might be more appropriate, though I haven't 
looked at all the IOException subclasses.

> getErasureCodingPolicyByName should throw a checked exception
> -------------------------------------------------------------
>
>                 Key: HDFS-11683
>                 URL: https://issues.apache.org/jira/browse/HDFS-11683
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Andrew Wang
>              Labels: newbie
>
> getErasureCodingPolicyByName throws a HadoopIllegalArgumentException, which 
> is a RuntimeException. This is basically only used by CLI tools and client 
> code, we should throw a different exception in the NameNode.



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