从ANT运行junitreport时的OutOfMemoryError

Question

我们有一个Jenkins工作来测试我们的应用程序.执行时,我们在执行使用以下代码片段生成junitreport的目标时获得着名的OutOfMemoryError.

        <junitreport todir="${tmp.dir}/reports-test-shared">
            <fileset dir="${tmp.dir}/reports-test-shared">
                <include name="TEST-*.xml" />
            </fileset>
            <report format="frames" todir="html" />
        </junitreport>

我们得到的确切堆栈跟踪如下.

/app/ci/jenkins/jobs/FLEETperfect Trunk Junit Test MOS/workspace/trunk/com.bsiag.fleet.build/build.xml:818: java.lang.OutOfMemoryError: Java heap space
    at com.sun.org.apache.xerces.internal.util.XMLStringBuffer.append(XMLStringBuffer.java:205)
    at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanData(XMLEntityScanner.java:1380)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanCDATASection(XMLDocumentFragmentScannerImpl.java:1654)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2986)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:235)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:180)
    at org.apache.tools.ant.taskdefs.optional.junit.XMLResultAggregator.createDocument(XMLResultAggregator.java:254)
    at org.apache.tools.ant.taskdefs.optional.junit.XMLResultAggregator.execute(XMLResultAggregator.java:144)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:392)
    at org.apache.tools.ant.Target.performTasks(Target.java:413)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.Main.runBuild(Main.java:811)
    at org.apache.tools.ant.Main.startAnt(Main.java:217)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

编辑:我们的build.xml中的第818行是上面显示的junitreport任务

我已经看过其他SO问题中给出的一些建议,例如这里,这里和这里.

最常见的建议是

• 在JAVA_OPTS中增加Xms和Xms
• 在ANT_OPTS中增加Xmx和Xms

这是我到目前为止所做的:

• 将env变量JAVA_OPTS设置为"-Xms512m -Xmx2048m"
• 将env变量ANT_OPTS设置为"-Xms512m -Xmx2048m"
• 在我执行的tomcat/bin目录中创建了setenv.sh:export JAVA_OPTS ="$ JAVA_OPTS -Xms512m -Xmx2048m"
• 为env变量JAVA_OPTS和ANT_OPTS添加了"-XX:MaxPermSize = 256m"

我的问题如下.我不知道我所做的内存设置是否是ANT用来运行报告生成的内存设置(junitreport)

为了让junitreport在没有OutOfMemoryError的情况下终止,我必须在哪里增加堆大小？

Answer 1

这样的问题可能会使用另一种方法解决.我没有增加堆空间,而是试图找到这么大空间需求的原因.我找到了一个向sysout写了很多信息的测试.这导致生成的xml文件大于200mb.显然对于2或3 GB的堆大小来说太大了.