VelocityViewServlet : Error processing the template

For input string: "6110/" 
java.lang.NumberFormatException: For input string: "6110/"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
	at java.lang.Integer.parseInt(Integer.java:456)
	at java.lang.Integer.parseInt(Integer.java:497)
	at peopleBlog.VelocityServlet.doRequest(VelocityServlet.java:312)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doGet(VelocityViewServlet.java:373)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at com.tongweb.webbase.facade.ServletHandler.doService(ServletHandler.java:662)
	at com.tongweb.webbase.core.Handler.invoke(Handler.java:333)
	at com.tongweb.webbase.core.Handler.service(Handler.java:235)
	at com.tongweb.webbase.facade.ServletHandler.service(ServletHandler.java:560)
	at com.tongweb.webbase.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:282)
	at com.tongweb.webbase.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:95)
	at com.tongweb.webbase.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.tongweb.webbase.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:197)
	at com.tongweb.webbase.core.ApplicationFilterChain.wrappedDoFilter(ApplicationFilterChain.java:175)
	at com.tongweb.webbase.facade.RequestDispatcherImpl.doInclude(RequestDispatcherImpl.java:447)
	at com.tongweb.webbase.facade.RequestDispatcherImpl.access$000(RequestDispatcherImpl.java:106)
	at com.tongweb.webbase.facade.RequestDispatcherImpl$RDIAction.run(RequestDispatcherImpl.java:577)
	at com.tongweb.webbase.util.compat.Jdk12Support$PrivilegedProxy.run(Jdk12Support.java:183)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.tongweb.webbase.util.compat.Jdk12Support.doPrivileged(Jdk12Support.java:100)
	at com.tongweb.webbase.facade.RequestDispatcherImpl.include(RequestDispatcherImpl.java:176)
	at net.sf.brickweb.PageBrick.render(PageBrick.java:46)
	at peopleBlog.velocity.PPLayoutFactory.execute(PPLayoutFactory.java:372)
	at peopleBlog.velocity.PPLayoutServlet.doGet(PPLayoutServlet.java:338)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at com.tongweb.webbase.facade.ServletHandler.doService(ServletHandler.java:662)
	at com.tongweb.webbase.core.Handler.invoke(Handler.java:333)
	at com.tongweb.webbase.core.Handler.service(Handler.java:235)
	at com.tongweb.webbase.facade.ServletHandler.service(ServletHandler.java:560)
	at com.tongweb.webbase.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:282)
	at com.tongweb.webbase.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:95)
	at com.tongweb.webbase.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.tongweb.webbase.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:197)
	at peopleBlog.SiteStatFilter.doFilter(SiteStatFilter.java:61)
	at com.tongweb.webbase.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:242)
	at com.tongweb.webbase.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:95)
	at com.tongweb.webbase.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.tongweb.webbase.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:197)
	at com.tongweb.webbase.core.ApplicationFilterChain.wrappedDoFilter(ApplicationFilterChain.java:175)
	at com.tongweb.webbase.core.ContextManager.internalService(ContextManager.java:1022)
	at com.tongweb.webbase.core.ContextManager.service(ContextManager.java:868)
	at com.tongweb.servlet.connectionMethods.http.HttpAdapter.service(HttpAdapter.java:148)
	at com.tongweb.servlet.connectionMethods.http.HttpProcessor.process(HttpProcessor.java:237)
	at com.tongweb.servlet.connectionMethods.http.HttpHandler.processRequests(HttpHandler.java:119)
	at com.tongweb.servlet.connectionMethods.http.HttpHandler.run(HttpHandler.java:92)
	at java.lang.Thread.run(Thread.java:595)