[jira] [Commented] (HDFS-17320) seekToNewSource uses ignoredNodes to get a new node other than the current node.

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-17320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18024723#comment-18024723 ] 

ASF GitHub Bot commented on HDFS-17320:
---------------------------------------

github-actions[bot] commented on PR #6403:
URL: https://github.com/apache/hadoop/pull/6403#issuecomment-3368627091

   We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
   If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
   Thanks all for your contribution.




> seekToNewSource uses ignoredNodes to get a new node other than the current node.
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-17320
>                 URL: https://issues.apache.org/jira/browse/HDFS-17320
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jian Zhang
>            Assignee: Jian Zhang
>            Priority: Minor
>              Labels: pull-request-available
>         Attachments: HDFS-17320.001.patch
>
>
> Currently, when using the DFSInputStream#seekToNewSource() method to obtain a new datanode, the current datanode will be marked as deadnode first, thus preventing the new datanode from being equal to the current datanode.
> If the current datanode is indeed a dead node, after obtaining the new datanode, there is no need to mark the current datanode as a non-dead node; but if the current node is not a dead node, after obtaining the new datanode, the current node needs to be marked as Non-dead nodes (removed from the deadnodes collection), the current implementation method has no problem with its function, but it is very inelegant.
> Currently, when selecting a new datanode (DFSInputStream#getBestNodeDNAddrPair), you can filter out unnecessary datanodes through the parameter ignoredNodes. Therefore, we only need to pass the current datanode into ignoredNodes to elegantly implement the function of the seekToNewSource method.



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