500 Servlet Exception

org.apache.velocity.exception.MethodInvocationException: Invocation of
method 'getResourceObject' in  class com.jute.cms.dao.SystemDao threw exception
class java.lang.OutOfMemoryError : PermGen space
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:246)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:175)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:220)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
	at org.apache.velocity.runtime.directive.Parse.render(Parse.java:181)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
	at org.apache.velocity.Template.merge(Template.java:256)
	at org.springframework.web.servlet.view.velocity.VelocityView.mergeTemplate(VelocityView.java:553)
	at org.springframework.web.servlet.view.velocity.VelocityView.doRender(VelocityView.java:500)
	at org.springframework.web.servlet.view.velocity.VelocityView.renderMergedTemplateModel(VelocityView.java:321)
	at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:160)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:928)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:705)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:625)
	at com.jute.framework.web.DispatcherServlet.doService(SourceFile:34)
	at org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkServlet.java:386)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:346)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:126)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
	at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
	at org.jute.filter.GZIPPageFilter.doFilter(SourceFile:24)
	at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
	at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
	at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
	at java.lang.Thread.run(Thread.java:619)