title: java.lang.OutOfMemoryError: PermGen space
body: <p>I am getting following error frequently in eclipse IDE 3.2, how could I save the application from these OutOfMemory?</p>
  
  <pre><code>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.&lt;clinit&gt;(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)
  </code></pre>