java.lang.OutOfMemoryError: PermGen space [closed]

Question

I am getting following error frequently in eclipse IDE 3.2, how could I save the application from these OutOfMemory?

java.lang.OutOfMemoryError: PermGen space     java.lang.ClassLoader.defineClass1(Native Method)     java.lang.ClassLoader.defineClassCond(Unknown Source)     java.lang.ClassLoader.defineClass(Unknown Source)     java.security.SecureClassLoader.defineClass(Unknown Source)     org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1814)     org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)     org.jboss.web.tomcat.service.WebAppClassLoader.findClass(WebAppClassLoader.java:75)     org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)     org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)     com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:289)     java.sql.DriverManager.getConnection(Unknown Source)     java.sql.DriverManager.getConnection(Unknown Source)     org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)     org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)     org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)     org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)     com.mfic.util.HibernateUtil.<clinit>(HibernateUtil.java:16)     com.mfic.dao.BaseHome.getSession(BaseHome.java:16)     com.mfic.core.helper.UserManager.findByUserId(UserManager.java:248)     com.mfic.core.action.Login.authenticate(Login.java:39)     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)     sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)     java.lang.reflect.Method.invoke(Unknown Source)     com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)     com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)     com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)     com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)     com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)     com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)     com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)     org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) 

Answer 1

If you are getting the questioned error in the secondary Eclipse Application, adding -XX:MaxPermSize=512m in ini won't help. You need to go into debug or run configuration->arguments and add that piece in VM arguments.I also increased others memory limits so:

-Dosgi.requiredJavaVersion=1.5 -Xms120m -Xmx2048m -XX:MaxPermSize=1024m 

It helped.

Edit. After some experiments I've found, that Eclipse does take memory limits from the ini file. But... it does it only once, at the creation of a new workspace. Parameters from -vmarg in eclipse.ini create the default VM parameters line. So, if you are working on the existing workspace, change debug or run configuration. But change eclipse.ini, too, for better future.