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https://issues.apache.org/jira/browse/HDFS-15813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17278185#comment-17278185
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Jim Brennan commented on HDFS-15813:
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I searched again and found this had been put up in [HDFS-12763] by [~kshukla]
back in 2017.
[~kihwal], [~daryn] given that we have been running with this in production for
5 years, I am not sure it is worth the effort to build a unit test for this.
Let me know what you think.
My inclination is to stick with this jira, since the patch is already up to
date with trunk, and close HDFS-12763 as a duplicate. If you'd prefer I move
the patch to HDFS-12763 and mark this one as a duplicate, I can do that instead.
> 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
>
>
> 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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