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https://issues.apache.org/jira/browse/HDFS-6614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053967#comment-14053967
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Chris Nauroth commented on HDFS-6614:
-------------------------------------
Thanks for the addendum patch. In my environments, I found that it was only
necessary to set {{DFS_CLIENT_RETRY_WINDOW_BASE}} to 0 (one-line patch). The
other changes for creating a new {{DFSClient}} and reordering the
{{Mockito#reset}} call seem to be unnecessary. Can we remove those changes and
commit just the one-line addendum patch, or are you finding that those changes
are required in your environment?
bq. Did your Windows VM run on a SSD or similar fast storage ?
Actually, it was the opposite. This is very slow virtualized storage on top of
HDD, so I/O generally is slower for me when I'm working on my Windows VM.
Another potential factor is timer resolution on Windows. I filed HDFS-6631 to
track fixing this part separately.
> shorten TestPread run time with a smaller retry timeout setting
> ---------------------------------------------------------------
>
> Key: HDFS-6614
> URL: https://issues.apache.org/jira/browse/HDFS-6614
> Project: Hadoop HDFS
> Issue Type: Test
> Components: test
> Affects Versions: 3.0.0, 2.5.0
> Reporter: Liang Xie
> Assignee: Liang Xie
> Priority: Minor
> Fix For: 3.0.0, 2.5.0
>
> Attachments: HDFS-6614-addmium.txt, HDFS-6614.txt
>
>
> Just notice logs like this from TestPread:
> DFS chooseDataNode: got # 3 IOException, will wait for 9909.622860072854 msec
> so i tried to set a smaller retry window value.
> Before patch:
> T E S T S
> -------------------------------------------------------
> Running org.apache.hadoop.hdfs.TestPread
> Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 154.812 sec -
> in org.apache.hadoop.hdfs.TestPread
> After the change:
> T E S T S
> -------------------------------------------------------
> Running org.apache.hadoop.hdfs.TestPread
> Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 131.724 sec -
> in org.apache.hadoop.hdfs.TestPread
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