Grails PermGem错误

Question

我需要帮助解决这个问题.我需要有人向我解释为什么会发生这种情况以及如何预防或避免它.

Exception in thread "Thread-747" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-748" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-759" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-760" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-764" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-765" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-766" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-767" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-773" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-774" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-780" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-781" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-788" java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-789" java.lang.OutOfMemoryError: PermGen space
2011-06-20 14:42:10,668 [http-8080-6] ERROR [/CM].[grails]  - Servlet.service() for servlet grails threw exception
java.lang.OutOfMemoryError: PermGen space
2011-06-20 14:42:10,668 [http-8080-6] ERROR [/CM].[default]  - Servlet.service() for servlet default threw exception
java.lang.OutOfMemoryError: PermGen space
: java.lang.OutOfMemoryError: PermGen space
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:116)
        at _GrailsPackage_groovy$_run_closure8.doCall(_GrailsPackage_groovy:275)
        at _GrailsPackage_groovy$_run_closure8.call(_GrailsPackage_groovy)
        at _GrailsRun_groovy$_run_closure8.doCall(_GrailsRun_groovy:245)
        at RunApp$_run_closure1.doCall(RunApp.groovy:35)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:590)
        at gant.Gant.executeTargets(Gant.groovy:589)
Caused by: java.lang.OutOfMemoryError: PermGen space
--- Nested Exception ---
java.lang.OutOfMemoryError: PermGen space
Error automatically restarting container: java.lang.OutOfMemoryError: PermGen space
Error executing script RunApp: PermGen space
java.lang.OutOfMemoryError: PermGen space
Error executing script RunApp: PermGen space
Application context shutting down...
Application context shutdown.

Answer 1

PermGen是JVM内存的一个区域,用于加载类.

在应用程序执行时,它会使用越来越多的内存,特别是如果您处于调试环境中,如果您大量使用闭包.

解决这个问题的方法是添加更多!

这是通过在启动应用程序时将一个或两个参数传递给JVM来完成的.

参数是:

-XX:MaxPermSize=256m
-XX:PermSize=128m

(根据您的具体需求调整值)

PermSize将是PermGen的初始大小,而MaxPermSize将是在你向帖子抛出异常之前它将增加的最大大小.

默认情况下,它设置为64M,如果你有一个"真正的"应用程序,这并不多.

请注意:您的total memory usage意愿是:Heap size + Perm Size