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From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6614) shorten TestPread run time with a smaller retry timeout setting
Date Thu, 03 Jul 2014 10:16:26 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14051293#comment-14051293
] 

Liang Xie commented on HDFS-6614:
---------------------------------

bq.  I did discover that the new testHedgedReadLoopTooManyTimes test is failing on my Windows
VM on the assertion for the loop count
Did your Windows VM run on a SSD or similar fast storage ? 
I think there's possibility that if "the second read + the second creating block reader" took
less then 1ms, then our asserted loopTimeNum could be 2, not 3.  Anyway, i assume changing
"assertEquals(3, input.getHedgedReadOpsLoopNumForTesting());" with "assertTrue(input.getHedgedReadOpsLoopNumForTesting()
<=3 && input.getHedgedReadOpsLoopNumForTesting() >=2);", should be better.

> 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.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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