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https://issues.apache.org/jira/browse/HDFS-15815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17280742#comment-17280742
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Xiaoqiao He commented on HDFS-15815:
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Hi [~hadoop_yangyun], it makes sense to me. Would you mind to fix the 
checkstyle first?

>  if required storageType are unavailable, log the failed reason during 
> choosing Datanode
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-15815
>                 URL: https://issues.apache.org/jira/browse/HDFS-15815
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: block placement
>            Reporter: Yang Yun
>            Assignee: Yang Yun
>            Priority: Minor
>         Attachments: HDFS-15815.001.patch
>
>
> For better debug,  if required storageType are unavailable, log the failed 
> reason "NO_REQUIRED_STORAGE_TYPE" when choosing Datanode.
>  
>  
>  



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