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Date: Tue, 9 Jul 2013 23:01:51 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12647142.1368231955663.22293.1373410911498@arcas>
In-Reply-To: <JIRA.12647142.1368231955663@arcas>
References: <JIRA.12647142.1368231955663@arcas>
Subject: [jira] [Commented] (HDFS-4816) transitionToActive blocks if the SBN
 is doing checkpoint image transfer
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    [ https://issues.apache.org/jira/browse/HDFS-4816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13703951#comment-13703951 ] 

Hadoop QA commented on HDFS-4816:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12589793/hdfs-4816-4.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/4614//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4614//console

This message is automatically generated.
                
> transitionToActive blocks if the SBN is doing checkpoint image transfer
> -----------------------------------------------------------------------
>
>                 Key: HDFS-4816
>                 URL: https://issues.apache.org/jira/browse/HDFS-4816
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0, 2.0.4-alpha
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>         Attachments: hdfs-4816-1.patch, hdfs-4816-2.patch, hdfs-4816-3.patch, hdfs-4816-4.patch, hdfs-4816-slow-shutdown.txt, stacks.out
>
>
> The NN and SBN do this dance during checkpoint image transfer with nested HTTP GETs via {{HttpURLConnection}}. When an admin does a {{-transitionToActive}} during this transfer, part of that is interrupting an ongoing checkpoint so we can transition immediately.
> However, the {{thread.interrupt()}} in {{StandbyCheckpointer#stop}} gets swallowed by {{connection.getResponseCode()}} in {{TransferFsImage#doGetUrl}}. None of the methods in HttpURLConnection throw InterruptedException, so we need to do something else (perhaps HttpClient [1]):
> [1]: http://hc.apache.org/httpclient-3.x/

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