最近，在重负载下进行测试时，我开始在我的新 jasper 报告应用程序中遇到 PermGen 空间问题。language="groovy通过在我的 jrxml 文件中指定，我使用 groovy 作为报告的表达式评估器。作为 groovy 表达式，在运行时创建类，我怀疑这是 permgen 填充的根本原因。我尝试设置 jvm 选项，例如-XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled，但它无助于解决问题。即使在 excpetion stacktrace（如下所示）中，类加载器也在尝试在失败时将新构建的类加载到 permgen 中。有没有人在使用 groovy 和 jasper 报告时遇到过这个问题？我的报告使用由提供的功能在单独的线程中异步填充AsynchronousFillHandlejasper 提供的课程。这与类加载器没有释放加载的运行时类有任何联系吗？任何建议将不胜感激。
Exception in thread "Thread-563" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-565" at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at org.codehaus.groovy.reflection.ClassLoaderForClassArtifacts.define(ClassLoaderForClassArtifacts.java:42)
at org.codehaus.groovy.reflection.ClassLoaderForClassArtifacts$1.run(ClassLoaderForClassArtifacts.java:86)
at org.codehaus.groovy.reflection.ClassLoaderForClassArtifacts$1.run(ClassLoaderForClassArtifacts.java:84)
at java.security.AccessController.doPrivileged(Native Method)
at org.codehaus.groovy.reflection.ClassLoaderForClassArtifacts.defineClassAndGetConstructor(ClassLoaderForClassArtifacts.java:84)
at org.codehaus.groovy.runtime.callsite.CallSiteGenerator.compilePogoMethod(CallSiteGenerator.java:215)
at org.codehaus.groovy.reflection.CachedMethod.createPogoMetaMethodSite(CachedMethod.java:220)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.createCachedMethodSite(PogoMetaMethodSite.java:206)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.createPogoMetaMethodSite(PogoMetaMethodSite.java:182)
at groovy.lang.MetaClassImpl.createPogoCallCurrentSite(MetaClassImpl.java:3034)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallCurrentSite(CallSiteArray.java:93)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:44)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
at Section_1_1348126593121_343308.evaluate(calculator_Section_1_1348126593121_343308:253)
at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:190)
at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:591)
at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:559)
at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:884)
at net.sf.jasperreports.engine.fill.JRFillTextField.evaluateText(JRFillTextField.java:421)
at net.sf.jasperreports.engine.fill.JRFillTextField.evaluate(JRFillTextField.java:406)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:257)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:457)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2037)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:771)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:301)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:148)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:909)