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https://issues.apache.org/jira/browse/HDFS-9103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14901614#comment-14901614
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Haohui Mai commented on HDFS-9103:
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There are definitely use cases that need full flexible APIs (rigorous testings
are one of those). However it's great to build an easy version of APIs on top
of that.
Speaking of the patch itself {{AsyncPreadSome}} needs to be completely
stateless. The name {{InputStream}} might be a little bit confusing now, but I
don't think it is a good idea to put this functionality there, as least for now.
> Retry reads on DN failure
> -------------------------
>
> Key: HDFS-9103
> URL: https://issues.apache.org/jira/browse/HDFS-9103
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: Bob Hansen
> Assignee: Bob Hansen
> Fix For: HDFS-8707
>
> Attachments: HDFS-9103.1.patch, HDFS-9103.2.patch
>
>
> When AsyncPreadSome fails, add the failed DataNode to the excluded list and
> try again.
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