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Date: Thu, 13 Sep 2012 04:53:09 +1100 (NCT)
From: "Andrey Klochkov (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <255061743.70596.1347472389514.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (HADOOP-8755) Print thread dump when tests fail
 due to timeout
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    [ https://issues.apache.org/jira/browse/HADOOP-8755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13454171#comment-13454171 ] 

Andrey Klochkov commented on HADOOP-8755:
-----------------------------------------

Hi Aaron, I'd like to make number of improvements before submitting a patch. These are:
# include dead lock detection into the dump
# introduce default timeouts on junit level

The 2nd one is not easy. I'm thinking about 2 possible ways to implement it, and both seem pretty hackie. The first is implementing a custom Surefire provider. It's not straightforward (if possible) as there are no explicit extension points for that in Surefire.  The second is doing instrumentation with a custom JVM agent, adding "timeout" parameter to the @Test annotation for all test methods which don't provide it. I'm planning to evaluate both ways but it may take time. I think a separate JIRA would be better for this part. WDYT?
                
> Print thread dump when tests fail due to timeout 
> -------------------------------------------------
>
>                 Key: HADOOP-8755
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8755
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: test
>    Affects Versions: 1.0.3, 0.23.1, 2.0.0-alpha
>            Reporter: Andrey Klochkov
>            Assignee: Andrey Klochkov
>         Attachments: HDFS-3762-branch-0.23.patch, HDFS-3762.patch, HDFS-3762.patch, HDFS-3762.patch, HDFS-3762.patch, HDFS-3762.patch
>
>
> When a test fails due to timeout it's often not clear what is the root cause. See HDFS-3364 as an example.
> We can print dump of all threads in this case, this may help finding causes.

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