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https://issues.apache.org/jira/browse/HDFS-976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000747#comment-13000747
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seahigh commented on HDFS-976:
------------------------------
I user hadoop-0.20.2, and had been trying to apply your patch, but always got
compilation errors.
How can I user this patch?
compile:
[echo] contrib: highavailability
[javac] Compiling 10 source files to
/home/hadoop/hadoop-0.20.2/build/contrib/highavailability/classes
[javac]
/home/hadoop/hadoop-0.20.2/src/contrib/highavailability/src/java/org/apache/hadoop/hdfs/server/namenode/Standby.java:341:
cannot find symbol
[javac] symbol : method saveNamespace(boolean)
[javac] location: class org.apache.hadoop.hdfs.server.namenode.FSImage
[javac] fsImage.saveNamespace(true);
[javac] ^
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] 1 error
BUILD FAILED
/home/hadoop/hadoop-0.20.2/build.xml:497: The following error occurred while
executing this line:
/home/hadoop/hadoop-0.20.2/src/contrib/build.xml:30: The following error
occurred while executing this line:
/home/hadoop/hadoop-0.20.2/src/contrib/build-contrib.xml:133: Compile failed;
see the compiler error output for details.
> Hot Standby for NameNode
> ------------------------
>
> Key: HDFS-976
> URL: https://issues.apache.org/jira/browse/HDFS-976
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: Dmytro Molkov
> Attachments: AvatarNode.20.patch, AvatarNode.patch,
> AvatarNodeDescription.txt, AvatarPatch.2.patch
>
>
> This is a place holder to share our code and experiences about implementing a
> Hot Standby for the HDFS NameNode for hadoop 0.20.
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