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https://issues.apache.org/jira/browse/HDFS-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13099662#comment-13099662
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Hudson commented on HDFS-2223:
------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #923 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/923/])
HDFS-2223. Untangle depencencies between NN components. Contributed by Todd
Lipcon.
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1166466
Files :
* /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/server/namenode/BackupImage.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/BackupNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Checkpointer.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.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/FSImageFormat.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeResourceChecker.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/common/TestDistributedUpgrade.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestClusterId.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLogRace.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestSaveNamespace.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/unit/org/apache/hadoop/hdfs/server/namenode/TestNNLeaseRecovery.java
> Untangle depencencies between NN components
> -------------------------------------------
>
> Key: HDFS-2223
> URL: https://issues.apache.org/jira/browse/HDFS-2223
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.24.0
>
> Attachments: hdfs-2223-1.txt, hdfs-2223-10.txt, hdfs-2223-2.txt,
> hdfs-2223-3.txt, hdfs-2223-4.txt, hdfs-2223-5.txt, hdfs-2223-6.txt,
> hdfs-2223-7.txt, hdfs-2223-8.txt, hdfs-2223-9.txt
>
>
> Working in the NN a lot for HA (HDFS-1623) I've come across a number of
> situations where the tangled dependencies between NN components has been
> problematic for adding new features and for testability. It would be good to
> untangle some of these and clarify what the distinction is between the
> different components: NameNode, FSNamesystem, FSDirectory, FSImage,
> NNStorage, and FSEditLog
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