500 Servlet Exception

java.lang.NullPointerException
	at home.system.ListDeal.getListNodeCount(listdeal.java:31)
	at home.system.ListShow.showListNoCheckBox(listshow.java:1248)
	at _vindicate._electronmap._out_0querynewbuilding__jsp._jspService(/vindicate/electronmap/out_querynewbuilding.jsp:325)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
	at com.caucho.jsp.Page.subservice(Page.java:485)
	at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
	at com.caucho.server.http.Invocation.service(Invocation.java:311)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:221)
	at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:163)
	at com.caucho.server.TcpConnection.run(TcpConnection.java:137)
	at java.lang.Thread.run(Thread.java:595)