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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5138) Support HDFS upgrade in HA
Date Sat, 21 Dec 2013 12:12:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13854850#comment-13854850
] 

Hadoop QA commented on HDFS-5138:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12619955/HDFS-5138.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 6 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:red}-1 findbugs{color}.  The patch appears to introduce 4 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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs
hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal:

                  org.apache.hadoop.hdfs.server.namenode.ha.TestBootstrapStandby
                  org.apache.hadoop.hdfs.server.namenode.ha.TestInitializeSharedEdits
                  org.apache.hadoop.hdfs.tools.offlineEditsViewer.TestOfflineEditsViewer
                  org.apache.hadoop.contrib.bkjournal.TestBookKeeperAsHASharedDir

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/5781//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/5781//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5781//console

This message is automatically generated.

> Support HDFS upgrade in HA
> --------------------------
>
>                 Key: HDFS-5138
>                 URL: https://issues.apache.org/jira/browse/HDFS-5138
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.1.1-beta
>            Reporter: Kihwal Lee
>            Assignee: Aaron T. Myers
>            Priority: Blocker
>         Attachments: HDFS-5138.patch
>
>
> With HA enabled, NN wo't start with "-upgrade". Since there has been a layout version
change between 2.0.x and 2.1.x, starting NN in upgrade mode was necessary when deploying 2.1.x
to an existing 2.0.x cluster. But the only way to get around this was to disable HA and upgrade.

> The NN and the cluster cannot be flipped back to HA until the upgrade is finalized. If
HA is disabled only on NN for layout upgrade and HA is turned back on without involving DNs,
things will work, but finaliizeUpgrade won't work (the NN is in HA and it cannot be in upgrade
mode) and DN's upgrade snapshots won't get removed.
> We will need a different ways of doing layout upgrade and upgrade snapshot.  I am marking
this as a 2.1.1-beta blocker based on feedback from others.  If there is a reasonable workaround
that does not increase maintenance window greatly, we can lower its priority from blocker
to critical.



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