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https://issues.apache.org/jira/browse/HDFS-5138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13946406#comment-13946406
 ] 

Hudson commented on HDFS-5138:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #520 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk/520/])
HDFS-5840. Follow-up to HDFS-5138 to improve error handling during partial 
upgrade failures. Contributed by Aaron T. Myers, Suresh Srinivas, and Jing 
Zhao. (jing9: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1581260)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/QuorumJournalManager.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JNStorage.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNode.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNUpgradeUtil.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/site/apt/HDFSHighAvailabilityWithQJM.apt.vm
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/qjournal/server/TestJournal.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHAStateTransitions.java
Move HDFS-5138 to 2.4.0 section in CHANGES.txt (jing9: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1581074)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> 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
>             Fix For: 3.0.0, 2.4.0
>
>         Attachments: HDFS-5138.branch-2.001.patch, HDFS-5138.patch, 
> HDFS-5138.patch, HDFS-5138.patch, HDFS-5138.patch, HDFS-5138.patch, 
> HDFS-5138.patch, HDFS-5138.patch, HDFS-5138.patch, HDFS-5138.patch, 
> HDFS-5138.patch, HDFS-5138.patch, hdfs-5138-branch-2.txt
>
>
> 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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