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http 500 in jsp page

karthik ekantha
Ranch Hand

Joined: Feb 08, 2012
Posts: 78
i got this error .....

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


root cause

java.lang.NullPointerException
org.apache.jsp.jsp.person_jsp._jspService(person_jsp.java:91)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs.


--------------------------------------------------------------------------------

Apache Tomcat/6.0.18




Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19761
    
  20

karthik ekantha wrote:

What happens if the session attribute hasn't been set yet? What will personalDetailsMap2 be?


That will always return false. As per the contract of Object.equals, it should always return false when the argument is null. To compare against null you should use ==, not equals.


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karthik ekantha
Ranch Hand

Joined: Feb 08, 2012
Posts: 78
thank you for your response....i got it output....
 
 
subject: http 500 in jsp page