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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3277) fail over to loading a different FSImage if the first one we try to load is corrupt
Date Thu, 26 Apr 2012 21:46:50 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13263167#comment-13263167
] 

Hadoop QA commented on HDFS-3277:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12524567/HDFS-3277.002.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 2 new or modified test files.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed these unit tests:
                  org.apache.hadoop.hdfs.tools.offlineImageViewer.TestOfflineImageViewer
                  org.apache.hadoop.hdfs.server.namenode.TestFSImageStorageInspector
                  org.apache.hadoop.hdfs.TestDFSUpgradeFromImage
                  org.apache.hadoop.hdfs.server.namenode.TestStartup
                  org.apache.hadoop.hdfs.server.namenode.TestNameNodeRecovery
                  org.apache.hadoop.hdfs.server.namenode.TestEditLog
                  org.apache.hadoop.fs.TestUrlStreamHandler

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/2339//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2339//console

This message is automatically generated.
                
> fail over to loading a different FSImage if the first one we try to load is corrupt
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-3277
>                 URL: https://issues.apache.org/jira/browse/HDFS-3277
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-3277.002.patch
>
>
> Most users store multiple copies of the FSImage in order to prevent catastrophic data
loss if a hard disk fails.  However, our image loading code is currently not set up to start
reading another FSImage if loading the first one does not succeed.  We should add this capability.
> We should also be sure to remove the FSImage directory that failed from the list of FSImage
directories to write to, in the way we normally do when a write (as opopsed to read) fails.

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