的Maven的Cobertura的OutOfMemoryError

Question

我使用Maven站点：运行生成的Cobertura代码覆盖...

以下是我的Cobertura配置的pom.xml：

<reporting> 
    ... 
    <plugins> 
     <plugin> 
      <groupId>org.codehaus.mojo</groupId> 
      <artifactId>cobertura-maven-plugin</artifactId> 
      <version>2.3</version> 
     </plugin> 
    </plugins> 
</reporting> 

但是我在得到的OutOfMemoryError网站结束：运行。请建议如何摆脱这个错误。 （我已经尝试了所有的-Xmx，-XX选项...）

Exception in thread "Thread-0" java.lang.OutOfMemoryError: Java heap space 
     at sun.reflect.GeneratedSerializationConstructorAccessor74.newInstance(Unknown Source) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
     at java.io.ObjectStreamClass.newInstance(ObjectStreamClass.java:924) 
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1737) 
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) 
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) 
     at java.util.HashMap.readObject(HashMap.java:1030) 
     at sun.reflect.GeneratedMethodAccessor347.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) 
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) 
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) 
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) 
     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) 
     at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:480) 
     at net.sourceforge.cobertura.coveragedata.CoverageDataContainer.readObject(CoverageDataContainer.java:373) 
     at sun.reflect.GeneratedMethodAccessor348.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) 
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) 
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) 
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) 
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) 
     at java.util.HashMap.readObject(HashMap.java:1030) 
     at sun.reflect.GeneratedMethodAccessor347.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) 
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) 
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) 

Answer 1

使用这个属性在你的pom.xml：

<project> 
... 
<build> 
... 
</build> 

<properties> 
    <cobertura.maxmem>256M</cobertura.maxmem> 
</properties> 

</project> 

Answer 2

你尝试类似export MAVEN_OPTS=-Xmx1024m（或匹配你的机器的最高值）？

如果您仍然没有足够的内存来运行maven，那么我会建议您尝试禁用其他插件并从测试覆盖范围中排除某些类以检查它是否真的存在内存问题。

<plugin> 
<groupId>org.codehaus.mojo</groupId> 
<artifactId>cobertura-maven-plugin</artifactId> 
<configuration> 
    <instrumentation> 
    <ignores> 
     <ignore>com.example.boringcode.*</ignore> 
    </ignores> 
    <excludes> 
     <exclude>com/example/dullcode/**/*.class</exclude> 
     <exclude>com/example/**/*Test.class</exclude> 
    </excludes> 
    </instrumentation> 
</configuration> 

http://mojo.codehaus.org/cobertura-maven-plugin/usage.html

编辑

其他的想法：

设置以下属性（见cobertura plugin properties）

-Dmaven.cobertura.report.maxmemory=xxx 
-Dmaven.cobertura.instrumentation.maxmemory=xxx 

尝试使用fork或使用以下内容增加内存。我不确定它是否适用于cobertura，但似乎适用于junit。从这个page片段：

<plugin> 
... 
<configuration> 
<forkMode>pertest</forkMode> 
</configuration> 
</plugin> 

或

<plugin> 
... 
<configuration> 
... 
<argLine>-Xmx512m -XX:MaxPermSize=256m</argLine> 
</configuration> 
</plugin>