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https://issues.apache.org/jira/browse/HDFS-3004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250110#comment-13250110
]
Hudson commented on HDFS-3004:
------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #2105 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2105/])
HDFS-3004. Implement Recovery Mode. Contributed by Colin Patrick McCabe
(Revision 1311394)
Result = SUCCESS
eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1311394
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/dev-support/findbugsExcludeFile.xml
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperEditLogInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/test/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogTestUtil.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/docs/src/documentation/content/xdocs/hdfs_user_guide.xml
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/HdfsServerConstants.java
*
/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/Checkpointer.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogBackupInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogFileInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogOutputStream.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/FSEditLogLoader.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogOp.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/FSImageTransactionalStorageInspector.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/FileJournalManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/JournalStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/MetaRecoveryContext.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNStorage.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/ha/EditLogTailer.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineEditsViewer/OfflineEditsXmlLoader.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/MiniDFSCluster.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLog.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/TestFSEditLogLoader.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeRecovery.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestSecurityTokenEditLog.java
> Implement Recovery Mode
> -----------------------
>
> Key: HDFS-3004
> URL: https://issues.apache.org/jira/browse/HDFS-3004
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: tools
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Fix For: 2.0.0
>
> Attachments: HDFS-3004.010.patch, HDFS-3004.011.patch,
> HDFS-3004.012.patch, HDFS-3004.013.patch, HDFS-3004.015.patch,
> HDFS-3004.016.patch, HDFS-3004.017.patch, HDFS-3004.018.patch,
> HDFS-3004.019.patch, HDFS-3004.020.patch, HDFS-3004.022.patch,
> HDFS-3004.023.patch, HDFS-3004.024.patch, HDFS-3004.026.patch,
> HDFS-3004.027.patch, HDFS-3004.029.patch, HDFS-3004.030.patch,
> HDFS-3004.031.patch, HDFS-3004.032.patch, HDFS-3004.033.patch,
> HDFS-3004.034.patch, HDFS-3004.035.patch, HDFS-3004.036.patch,
> HDFS-3004.037.patch, HDFS-3004.038.patch, HDFS-3004.039.patch,
> HDFS-3004.040.patch, HDFS-3004.041.patch, HDFS-3004.042.patch,
> HDFS-3004.042.patch, HDFS-3004.042.patch, HDFS-3004.043.patch,
> HDFS-3004__namenode_recovery_tool.txt
>
>
> When the NameNode metadata is corrupt for some reason, we want to be able to
> fix it. Obviously, we would prefer never to get in this case. In a perfect
> world, we never would. However, bad data on disk can happen from time to
> time, because of hardware errors or misconfigurations. In the past we have
> had to correct it manually, which is time-consuming and which can result in
> downtime.
> Recovery mode is initialized by the system administrator. When the NameNode
> starts up in Recovery Mode, it will try to load the FSImage file, apply all
> the edits from the edits log, and then write out a new image. Then it will
> shut down.
> Unlike in the normal startup process, the recovery mode startup process will
> be interactive. When the NameNode finds something that is inconsistent, it
> will prompt the operator as to what it should do. The operator can also
> choose to take the first option for all prompts by starting up with the '-f'
> flag, or typing 'a' at one of the prompts.
> I have reused as much code as possible from the NameNode in this tool.
> Hopefully, the effort that was spent developing this will also make the
> NameNode editLog and image processing even more robust than it already is.
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