Error 500--Internal Server Error

java.lang.NumberFormatException: For input string: " "
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:569)
	at java.lang.Integer.parseInt(Integer.java:615)
	at com.vnnet.process.Lottery.thongkeCapsoCau(Lottery.java:2952)
	at jsp_servlet._web_45_inf._jsp._soi_45_cau.__soi_45_cau_45_tong_45_hop._jspService(__soi_45_cau_45_tong_45_hop.java:585)
	at weblogic.servlet.jsp.JspBase.service(JspBase.java:35)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:247)
	at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:625)
	at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:282)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1180)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
	at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at com.planetj.servlet.filter.compression.CompressingFilter.doFilter(CompressingFilter.java:293)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3683)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
	at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
	at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
	at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
	at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
	at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691)
	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651)
	at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
	at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
	at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
	at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
	at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
	at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)