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https://issues.apache.org/jira/browse/HDFS-15813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17278973#comment-17278973
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Jim Brennan commented on HDFS-15813:
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patch 004 fixes the checkstyle issue. I don't think the unit test failures are
related. I was not able to reproduce them locally.
> DataStreamer: keep sending heartbeat packets while streaming
> ------------------------------------------------------------
>
> Key: HDFS-15813
> URL: https://issues.apache.org/jira/browse/HDFS-15813
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.4.0
> Reporter: Jim Brennan
> Assignee: Jim Brennan
> Priority: Major
> Attachments: HDFS-15813.001.patch, HDFS-15813.002.patch,
> HDFS-15813.003.patch, HDFS-15813.004.patch
>
>
> In response to [HDFS-5032], [~daryn] made a change to our internal code to
> ensure that heartbeats continue during data steaming, even in the face of a
> slow disk.
> As [~kihwal] noted, absence of heartbeat during flush will be fixed in a
> separate jira. It doesn't look like this change was ever pushed back to
> apache, so I am providing it here.
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