CODEWITHSUNDEEP
javajsptomcatservlets
user1611777
user1611777

Reputation: 39

java.lang.NullPointerException at org.apache.jsp.page_jsp._jspInit in Tomcat 6, but works in Tomcat 7

In my servlet I do:

request.getRequestDispatcher("/page.jsp").forward(request,response);

I get the following NullPointerException on Tomcat 6, but it works in Tomcat 7.

SEVERE: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException
    at org.apache.jsp.page_jsp._jspInit(page_jsp.java:23)
    at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
    at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
    at com.dotvocal.poa.vocal.main.servlet.LoadCompany.execute(MyServlet.java:100)
    at com.dotvocal.poa.vocal.main.servlet.LoadCompany.doGet(MyServlet.java:60)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Unknown Source)

I also tried the following:

request.getRequestDispatcher("http://localhost:8080/myapp/page.jsp").forward(request,response);

But it didn't solve the problem.

Upvotes: 1

Views: 13668

Answers (2)

Fede Gratti
Fede Gratti

Reputation: 11

I had the same error using JBoss 4.3, my solution was deleting the log, work and tmp folder from my JBoss enviroment.

Upvotes: 0

BalusC
BalusC

Reputation: 1108702

java.lang.NullPointerException at org.apache.jsp.page_jsp._jspInit(page_jsp.java:23)

You have servletcontainer-specific JSP libraries such as jsp-api.jar in your webapp's /WEB-INF/lib or maybe JDK/lib or JDK/lib/ext.

Remove them. They don't belong there at all. The servletcontainer itself already ships with those libraries. Based on the problem symptoms, the one which you've in your webapp originated from Tomcat 7 and thus your webapp will fail to work when you deploy it to a different servletcontainer make/version such as Tomcat 6, because it would conflict with servletcontainer's own libraries.

Erroneously placing servletcontainer-specific libraries in webapp's /WEB-INF/lib is a classic starter's mistake in a wrong attempt to fix Servlet API compilation errors in the IDE project. You should instead reference the servletcontainer as "target runtime" in the IDE project.

See also:

Upvotes: 2

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