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Date: Thu, 21 Apr 2011 16:48:05 +0000 (UTC)
From: "Matt Foley (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-1808) TestBalancer waits forever, errs
 without giving information
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    [ https://issues.apache.org/jira/browse/HDFS-1808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022825#comment-13022825 ] 

Matt Foley commented on HDFS-1808:
----------------------------------

The javadoc error is due to HDFS-1857, and unrelated to this patch.
The unit test failure on TestFileConcurrentReader is unrelated to this patch.

Ready to commit.

> TestBalancer waits forever, errs without giving information
> -----------------------------------------------------------
>
>                 Key: HDFS-1808
>                 URL: https://issues.apache.org/jira/browse/HDFS-1808
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, name-node
>    Affects Versions: 0.22.0
>            Reporter: Matt Foley
>            Assignee: Matt Foley
>             Fix For: 0.23.0
>
>         Attachments: 1808_TestBalancer_v3.patch, 1808_TestBalancer_v4.patch, TestBalancer.java.patch
>
>
> In three locations in the code, TestBalancer waits forever on a condition.  Failures result in Hudson/Jenkins "Timeout occurred" error message with no information about where or why.  Need to replace with TimeoutExceptions that throw a stack trace and useful info about the failure mode.
> In waitForHeartBeat(), it is waiting on an exact match for a value that may be coarsely quantized -- i.e., significant deviation from the exact "expected" result may occur.  Replace with an allowed range of result.

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