tomcat - JAXB - Tomcat 服务器上的 permGen 错误

Question

我在运行已部署的应用程序时收到以下错误。根据错误，似乎是 JAXB 造成的。请建议。

java.lang.OutOfMemoryError: PermGen space
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(RuntimeModelBuilder.java:99)
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(RuntimeModelBuilder.java:70)
    com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:228)
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89)
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:198)
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84)
    com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:304)
    com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:319)
    com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:430)
    com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:277)
    com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1100)
    com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:143)
    com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:110)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:202)
    javax.xml.bind.ContextFinder.find(ContextFinder.java:376)
    javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:574)
    javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:522)
    MyJava.GetUserProfile.user(GetUserProfile.java:87)
    com.myapp.struts.TokenDirected.execute(TokenDirected.java:81)
    org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Answer 1

在 Tomcat 5.5 中有同样的问题JAXB 会导致大量内存泄漏，因为它会在服务器中创建大量静态变量。

引用资料: http://blogs.oracle.com/fkieviet/entry/classloader_leaks_the_dreaded_java http://blogs.oracle.com/fkieviet/entry/how_to_fix_the_dreaded