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https://issues.apache.org/jira/browse/HBASE-13251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14528678#comment-14528678
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Hadoop QA commented on HBASE-13251:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12730489/HBASE-13251-v2.patch
against master branch at commit 977f867439e960c668ee6311e47c904efc40f219.
ATTACHMENT ID: 12730489
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+0 tests included{color}. The patch appears to be a
documentation patch that doesn't require tests.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.1 2.5.2 2.6.0)
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 checkstyle{color}. The applied patch does not increase the
total number of checkstyle errors
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:red}-1 lineLengths{color}. The patch introduces the following lines
longer than 100:
+To give the MapReduce jobs the access they need, you could add
_hbase-site.xml_ to _$HADOOP_HOME/conf_ and add HBase jars to the
_$HADOOP_HOME/lib_ directory.
+You would then need to copy these changes across your cluster or edit
_$HADOOP_HOME/conf/hadoop-env.sh_ and add them to the `HADOOP_CLASSPATH`
variable.
+The recommended approach is to let HBase add its dependency jars itself and
use `HADOOP_CLASSPATH` or `-libjars`.
+The following example runs the bundled HBase
link:http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/RowCounter.html[RowCounter]
MapReduce job against a table named `usertable`.
+If you have not set the environment variables expected in the command (the
parts prefixed by a `$` sign and surrounded by curly braces), you can use the
actual system paths instead.
+The backticks (``` symbols) cause ths shell to execute the sub-commands,
setting the output of `hbase classpath` (the command to dump HBase CLASSPATH)
to `HADOOP_CLASSPATH`.
+$ HADOOP_CLASSPATH=`${HBASE_HOME}/bin/hbase classpath`
${HADOOP_HOME}/bin/hadoop jar ${HBASE_HOME}/lib/hbase-server-VERSION.jar
rowcounter usertable
+The command of `hbase mapredcp` can also help you dump the CLASSPATH entries
required by MapReduce, which are the same jars
`TableMapReduceUtil#addDependencyJars` would add.
+For jobs that do not package their dependencies or call
`TableMapReduceUtil#addDependencyJars`, the following command structure is
necessary:
+$ HADOOP_CLASSPATH=`${HBASE_HOME}/bin/hbase mapredcp`:${HBASE_HOME}/conf
hadoop jar MyApp.jar MyJobMainClass -libjars $(${HBASE_HOME}/bin/hbase mapredcp
| tr ':' ',') ...
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/13940//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/13940//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/13940//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/13940//console
This message is automatically generated.
> Correct 'HBase, MapReduce, and the CLASSPATH' section in HBase Ref Guide
> ------------------------------------------------------------------------
>
> Key: HBASE-13251
> URL: https://issues.apache.org/jira/browse/HBASE-13251
> Project: HBase
> Issue Type: Improvement
> Components: documentation
> Reporter: Jerry He
> Assignee: li xiang
> Labels: documentation
> Attachments: HBASE-13251-v1.patch, HBASE-13251-v2.patch
>
>
> As [~busbey] pointed out in HBASE-13149, we have a section "HBase, MapReduce,
> and the CLASSPATH" in the HBase Ref Guide.
> http://hbase.apache.org/book.html#hbase.mapreduce.classpath
> There are duplication, errors and misinformation in the section.
> Need to cleanup and polish it.
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