HADOOP-9247. Merge r1438698 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1439531 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -134,6 +134,9 @@ Release 2.0.3-alpha - Unreleased
 
     HADOOP-9241. DU refresh interval is not configurable (harsh)
 
+    HADOOP-9247. Parametrize Clover "generateXxx" properties to make them
+    re-definable via -D in mvn calls. (Ivan A. Veselovsky via suresh)
+
   OPTIMIZATIONS
 
     HADOOP-8866. SampleQuantiles#query is O(N^2) instead of O(N). (Andrew Wang

pom.xml

@@ -409,6 +409,18 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
       <properties>
         <cloverLicenseLocation>${user.home}/.clover.license</cloverLicenseLocation>
         <cloverDatabase>${project.build.directory}/clover/hadoop-coverage.db</cloverDatabase>
+        <!-- NB: This additional parametrization is made in order 
+             to be able to re-define these properties with "-Dk=v" maven options.
+             By some reason the expressions declared in clover 
+             docs like "${maven.clover.generateHtml}" do not work in that way. 
+             However, the below properties are confirmed to work: e.g. 
+             -DcloverGenHtml=false switches off the Html generation.  
+             The default values provided here exactly correspond to Clover defaults, so
+             the behavior is 100% backwards compatible. -->
+        <cloverAlwaysReport>true</cloverAlwaysReport>
+        <cloverGenHtml>true</cloverGenHtml>
+        <cloverGenXml>true</cloverGenXml>
+        <cloverGenHistorical>false</cloverGenHistorical>
       </properties>
       <build>
         <plugins>
@@ -422,8 +434,10 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
               <cloverDatabase>${cloverDatabase}</cloverDatabase>
               <targetPercentage>50%</targetPercentage>
               <outputDirectory>${project.build.directory}/clover</outputDirectory>
-              <generateHtml>true</generateHtml>
+              <alwaysReport>${cloverAlwaysReport}</alwaysReport>
-              <generateXml>true</generateXml>
+              <generateHtml>${cloverGenHtml}</generateHtml>
+              <generateXml>${cloverGenXml}</generateXml>
+              <generateHistorical>${cloverGenHistorical}</generateHistorical>
             </configuration>
             <executions>
               <execution>