Salut à tous,

je débute en jsp et j'ai un projet web dans lequel se trouve +sieurs jsp, bref dans le log du projet j'ai un NullPointerException qui vient mais pour la jsp je pense, enfin je vous mets le stacktrace pour que vous puissiez y voir plus clair enfin si c'est possible; Je ne sais pas trop comment faire pour débuger ce code, auriez-vous une aide quelconque, d'avance merci :
[java] ERROR - StandardWrapperValve.invoke(250) | "Servlet.service()" pour la servlet jsp a généré une exception
[java] java.lang.NullPointerException
[java] at org.apache.jsp.getImage_jsp._jspService(getImage_jsp.java:90)
[java] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
[java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
[java] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
[java] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
[java] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
[java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
[java] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
[java] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
[java] at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
[java] at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)
[java] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
[java] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:264)
[java] at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
[java] at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:217)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:108)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:193)
[java] at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)
[java] at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:148)
[java] at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
[java] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
[java] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
[java] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
[java] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
[java] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
[java] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
[java] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
[java] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
[java] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
[java] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
[java] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
[java] at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
[java] at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
[java] at java.lang.Thread.run(Thread.java:595)