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https://issues.apache.org/jira/browse/HDFS-976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097830#comment-13097830
]
Shanmuganathan Ramalingam commented on HDFS-976:
------------------------------------------------
I have downloaded code from https://github.com/facebook/hadoop-20-warehouse
site.When I compiled this patch, I got the following error.How can I rectify it?
compile-mapred-classes:
[javac] /home/test/ips/facebook-hadoop-20-warehouse-bbfed86/build.xml:392:
warning: 'includeantruntime' was not set, defaulting to
build.sysclasspath=last; set to false for repeatable builds
[javac] Compiling 304 source files to
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/build/classes
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/mapred/org/apache/hadoop/mapred/Task.java:1200:
warning: [unchecked] unchecked cast
[javac] found : java.lang.Class<capture#419 of ? extends
org.apache.hadoop.mapred.Reducer>
[javac] required: java.lang.Class<? extends
org.apache.hadoop.mapred.Reducer<K,V,K,V>>
[javac] (Class<? extends Reducer<K,V,K,V>>) job.getCombinerClass();
[javac] ^
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/mapred/org/apache/hadoop/mapred/Task.java:1202:
warning: [unchecked] unchecked call to OldCombinerRunner(java.lang.Class<?
extends
org.apache.hadoop.mapred.Reducer<K,V,K,V>>,org.apache.hadoop.mapred.JobConf,org.apache.hadoop.mapred.Counters.Counter,org.apache.hadoop.mapred.Task.TaskReporter)
as a member of the raw type org.apache.hadoop.mapred.Task.OldCombinerRunner
[javac] return new OldCombinerRunner(cls, job, inputCounter,
reporter);
[javac] ^
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/mapred/org/apache/hadoop/mapred/Task.java:1202:
warning: [unchecked] unchecked conversion
[javac] found : org.apache.hadoop.mapred.Task.OldCombinerRunner
[javac] required: org.apache.hadoop.mapred.Task.CombinerRunner<K,V>
[javac] return new OldCombinerRunner(cls, job, inputCounter,
reporter);
[javac] ^
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/mapred/org/apache/hadoop/mapred/Task.java:1209:
warning: [unchecked] unchecked cast
[javac] found : java.lang.Class<capture#361 of ? extends
org.apache.hadoop.mapreduce.Reducer<?,?,?,?>>
[javac] required: java.lang.Class<? extends
org.apache.hadoop.mapreduce.Reducer<K,V,K,V>>
[javac] taskContext.getCombinerClass();
[javac] ^
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/mapred/org/apache/hadoop/mapred/Task.java:1231:
warning: [unchecked] unchecked cast
[javac] found : java.lang.Class<capture#478 of ?>
[javac] required: java.lang.Class<K>
[javac] keyClass = (Class<K>) job.getMapOutputKeyClass();
[javac] ^
.
.
.
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/hdfs/org/apache/hadoop/hdfs/DFSClient.java:1262:
reference to CorruptFileBlocks is ambiguous, both class
org.apache.hadoop.hdfs.protocol.CorruptFileBlocks in
org.apache.hadoop.hdfs.protocol and class
org.apache.hadoop.fs.CorruptFileBlocks in org.apache.hadoop.fs match
[javac] return new CorruptFileBlocks(str.toArray(new
String[str.size()]), "");
[javac] ^
[javac]
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/src/hdfs/org/apache/hadoop/hdfs/tools/JMXGet.java:148:
warning: sun.management.ConnectorAddressLink is Sun proprietary API and may be
removed in a future release
[javac] url_string =
ConnectorAddressLink.importFrom(Integer.parseInt(localVMPid));
[javac] ^
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] 7 errors
[javac] 2 warnings
BUILD FAILED
/home/test/ips/facebook-hadoop-20-warehouse-bbfed86/build.xml:428: Compile
failed; see the compiler error output for details.
Total time: 4 minutes 17 seconds
> 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: 0001-0.20.3_rc2-AvatarNode.patch, 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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