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https://issues.apache.org/jira/browse/HBASE-4050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408615#comment-13408615
 ] 

Zhihong Ted Yu commented on HBASE-4050:
---------------------------------------

The reason Hadoop QA didn't get back was because of the OutOfMemoryError 
compiling against hadoop 2.0:
{code}
[INFO] Compiling 765 source files to 
/Users/zhihyu/trunk-hbase/hbase-server/target/classes
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Skipping HBase - Server
[INFO] This project has been banned from the build due to previous failures.
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 12:10.921s
[INFO] Finished at: Sat Jul 07 03:25:44 PDT 2012
[INFO] Final Memory: 35M/123M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) 
on project hbase-server: Fatal error compiling: Error while executing the 
compiler. InvocationTargetException: Java heap space -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) 
on project hbase-server: Fatal error compiling
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
        at 
org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
        at 
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: Fatal error compiling
        at 
org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:498)
        at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
        at 
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        ... 19 more
Caused by: org.codehaus.plexus.compiler.CompilerException: Error while 
executing the compiler.
        at 
org.codehaus.plexus.compiler.javac.JavacCompiler.compileInProcess(JavacCompiler.java:434)
        at 
org.codehaus.plexus.compiler.javac.JavacCompiler.compile(JavacCompiler.java:141)
        at 
org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:493)
        ... 22 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
org.codehaus.plexus.compiler.javac.JavacCompiler.compileInProcess(JavacCompiler.java:420)
        ... 24 more
Caused by: java.lang.OutOfMemoryError: Java heap space
{code}
Here is the command I used:
{code}
mvn clean test help:active-profiles -X -DskipTests -Dhadoop.profile=2.0
{code}
                
> Update HBase metrics framework to metrics2 framework
> ----------------------------------------------------
>
>                 Key: HBASE-4050
>                 URL: https://issues.apache.org/jira/browse/HBASE-4050
>             Project: HBase
>          Issue Type: New Feature
>          Components: metrics
>    Affects Versions: 0.90.4
>         Environment: Java 6
>            Reporter: Eric Yang
>            Assignee: Alex Baranau
>            Priority: Critical
>             Fix For: 0.96.0
>
>         Attachments: 4050-metrics-v2.patch, HBASE-4050.patch
>
>
> Metrics Framework has been marked deprecated in Hadoop 0.20.203+ and 0.22+, 
> and it might get removed in future Hadoop release.  Hence, HBase needs to 
> revise the dependency of MetricsContext to use Metrics2 framework.

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