500 Internal Server Error

/isp/jsp/home.jsp:

null
java.lang.NullPointerException
	at java.lang.String.concat(Unknown Source)
	at com.studyislam.portal.PollView.getPollFromDB(PollView.java:89)
	at jrun__jsp__inc__leftNav2ejsp14._jspService(jrun__jsp__inc__leftNav2ejsp14.java:220)
	at allaire.jrun.jsp.HttpJSPServlet.service(../jsp/HttpJSPServlet.java:40)
	at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
	at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
	at allaire.jrun.servlet.JRunNamedDispatcher.forward(../servlet/JRunNamedDispatcher.java:34)
	at allaire.jrun.jsp.JSPServlet.service(../jsp/JSPServlet.java:175)
	at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
	at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
	at allaire.jrun.servlet.JRunRequestDispatcher.include(../servlet/JRunRequestDispatcher.java:126)
	at allaire.jrun.jsp.JRunPageContext.include(../jsp/JRunPageContext.java:341)
	at jrun__jsp__home2ejspd._jspService(jrun__jsp__home2ejspd.java:58)
	at allaire.jrun.jsp.HttpJSPServlet.service(../jsp/HttpJSPServlet.java:40)
	at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
	at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
	at allaire.jrun.servlet.JRunNamedDispatcher.forward(../servlet/JRunNamedDispatcher.java:34)
	at allaire.jrun.jsp.JSPServlet.service(../jsp/JSPServlet.java:175)
	at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1013)
	at allaire.jrun.servlet.JRunSE.runServlet(../servlet/JRunSE.java:925)
	at allaire.jrun.servlet.JRunRequestDispatcher.forward(../servlet/JRunRequestDispatcher.java:88)
	at allaire.jrun.servlet.JRunSE.service(../servlet/JRunSE.java:1131)
	at allaire.jrun.servlet.JvmContext.dispatch(../servlet/JvmContext.java:330)
	at allaire.jrun.jrpp.ProxyEndpoint.run(../jrpp/ProxyEndpoint.java:382)
	at allaire.jrun.ThreadPool.run(../ThreadPool.java:272)
	at allaire.jrun.WorkerThread.run(../WorkerThread.java:75)