Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-issues@hadoop.apache.org
Date: Fri, 30 Mar 2012 19:46:33 +0000 (UTC)
From: "Todd Lipcon (Commented) (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: 
 <1421576126.39543.1333136793986.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <5185336.35397.1333058245814.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HADOOP-8228) Auto HA: Refactor tests and add
 stress tests
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HADOOP-8228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13242677#comment-13242677 ] 

Todd Lipcon commented on HADOOP-8228:
-------------------------------------

bq. One question: are you positive that the ordering of the two @After methods either doesn't matter, or is guaranteed to happen in the right order?

The order of the two @After methods is nondeterministic. But, in this case, it's only important that our @After method runs before the superclass (ClientBase)'s tearDown. JUnit does guarantee the ordering in this case.

bq. One comment: maybe use a deterministic random seed for the Random instances you're using? Or at least log the amount of time that the test is sleeping for and what it's throwing?
Good point. I added additional logging for when it throws exceptions, and for when it expires sessions. I don't think the deterministic seed helps things, since the interleaving is still non-deterministic (that's part of the value of these tests :) )
                
> Auto HA: Refactor tests and add stress tests
> --------------------------------------------
>
>                 Key: HADOOP-8228
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8228
>             Project: Hadoop Common
>          Issue Type: Test
>          Components: auto-failover, ha, test
>    Affects Versions: Auto Failover (HDFS-3042)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hadoop-8228.txt, hadoop-8228.txt, hadoop-8228.txt
>
>
> It's important that the ZKFailoverController be robust and not contain race conditions, etc. One strategy to find potential races is to add stress tests which exercise the code as fast as possible. This JIRA is to implement some test cases of this style.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira