Hi Forum,
I am very new to hibernate so let me know if you need more information.
We have Struts based application and using hibernate 3.0.
Our application runs fine for few users but when around 10 users log in and access it .it crashes after a while. I am posting error log. I will appreciate if anybody has any idea about it:

java.lang.NullPointerException
at org.hibernate.hql.ast.IdentNode.getDisplayText(IdentNode.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.nodeToString(ASTPrinter.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showNode(ASTPrinter.java(Inlined Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Inlined Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAst(ASTPrinter.java(Inlined Compiled Code))
at org.hibernate.hql.ast.ASTPrinter.showAsString(ASTPrinter.java(Inlined Compiled Code))
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java(Compiled Code))
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java(Compiled Code))
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java(Compiled Code))
at org.hibernate.impl.SessionFactoryImpl.getQuery(SessionFactoryImpl.java(Compiled Code))
at org.hibernate.impl.SessionImpl.getQueries(SessionImpl.java(Inlined Compiled Code))
at org.hibernate.impl.SessionImpl.list(SessionImpl.java(Compiled Code))
at org.hibernate.impl.QueryImpl.list(QueryImpl.java(Compiled Code))
at com.dcf.dataAccess.FlindividualDALC.getIndividualCountInAppl(FlindividualDALC.java:367)
at com.dcf.struts.action.ScrFLIndividualsAction.init(ScrFLIndividualsAction.java:98)
at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:274)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java(Compiled Code))
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java(Compiled Code))
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java(Compiled Code))
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java(Compiled Code))
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java(Compiled Code))
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java(Compiled Code))
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java(Compiled Code))
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java(Compiled Code))
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:567)