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From "Henry Robinson (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3243) TestParallelRead timing out on jenkins
Date Tue, 10 Apr 2012 19:11:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henry Robinson updated HDFS-3243:
---------------------------------

    Attachment: HDFS-3243.0.patch

Turns out I left N_ITERATIONS as 4096 in HDFS-2834, not 1024 as it used to be. The tests run
much more quickly for me now, as you might expect, and directly comparable with the old test
code run against trunk.

This does shine a light on a separate issue, which is that ByteBufferReadable lacks a lockless
pread, which is faked out in this test by seeking-then-reading under a lock, with a bit of
unnecessary serialisation as a result. I've opened HDSF-3246 to track this. 
                
> TestParallelRead timing out on jenkins
> --------------------------------------
>
>                 Key: HDFS-3243
>                 URL: https://issues.apache.org/jira/browse/HDFS-3243
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client, test
>            Reporter: Todd Lipcon
>            Assignee: Henry Robinson
>         Attachments: HDFS-3243.0.patch
>
>
> Trunk builds have been failing recently due to a TestParallelRead timeout. It doesn't
report in the Jenkins failure list because surefire handles timeouts really poorly.

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