我收到此java.lang.OutOfMemoryError: PermGen space异常。我正在使用Eclipse Juno和Tomcat 7.0。在控制台中，每10-15分钟至少发生一次此异常。怎么解决呢？
Feb 25, 2016 10:23:23 AM org.springframework.beans.factory.support.DefaultListableBeanFactory destroyBean
SEVERE: Destroy method on bean with name 'mvcUrlPathHelper' threw an exception
java.lang.OutOfMemoryError: PermGen space
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2895)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2895)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessBeforeDestruction(PersistenceAnnotationBeanPostProcessor.java:375)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:242)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:925)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:932)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:997)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:547)
Feb 25, 2016 10:23:24 AM org.springframework.beans.factory.support.DefaultListableBeanFactory destroyBean
SEVERE: Destroy method on bean with name 'mvcPathMatcher' threw an exception
java.lang.OutOfMemoryError: PermGen space
Exception in thread "ContainerBackgroundProcessor[StandardEngine[Catalina]]" java.lang.OutOfMemoryError: PermGen space
与其在eclipse.ini中进行更改，不如安装Java 8。
我安装了Java 8，但现在没有java.lang.OutOfMemoryError: PermGen space异常。
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