下載了protobuf2.5 但是按照readme中得步驟進行 發現 mvn test 未能通過，錯誤如下：

[WARNING] File encoding has not been set, using platform encoding EUC_CN, i.e. build is platform dependent!

[INFO] Compiling 60 source files to /Users/davin/Documents/open_source/protobuf-2.5.0/java/target/test-classes

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java.lang.OutOfMemoryError: Java heap space

at com.sun.tools.javac.util.Position$LineMapImpl.build(Position.java:139)

at com.sun.tools.javac.util.Position.makeLineMap(Position.java:63)

at com.sun.tools.javac.parser.Scanner.getLineMap(Scanner.java:1113)

at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:512)

at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:550)

at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:804)

at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:727)

at com.sun.tools.javac.main.Main.compile(Main.java:353)

at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:115)

at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:126)

at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:169)

at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:785)

at org.apache.maven.plugin.compiler.TestCompilerMojo.execute(TestCompilerMojo.java:152)

at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)

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:320)

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)

[INFO] -------------------------------------------------------------

[ERROR] COMPILATION ERROR : 

[INFO] -------------------------------------------------------------

[ERROR] An unknown compilation problem occurred

[INFO] 1 error

[INFO] -------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

需要在pom.xml 中設定，meminitial 和 maxmem 2項 還有一點一定要注意一定要增加上

<fork>true</fork>

修改後如下：

<plugin>

        <artifactId>maven-compiler-plugin</artifactId>

        <version>3.1</version>

        <configuration>

        <fork>true</fork>

          <meminitial>128m</meminitial>

          <maxmem>512m</maxmem>

          <source>1.5</source>

          <target>1.5</target>

        </configuration>

  </plugin>

然後在進行mvn test 

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESS

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 1:14.484s

[INFO] Finished at: Tue May 13 11:30:37 CST 2014

[INFO] Final Memory: 8M/81M

附件是修改後的整個pom.xml 備參考。